Roger Federer

One of the greatest tennis players of all time will represent Switzerland at the London Games.

FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
Nick Kyrgios laughs during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios laughs during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios laughs during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios returns a ball during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios returns a ball during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios returns a ball during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Nick Kyrgios returns the ball to Roger Federer in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Nick Kyrgios returns the ball to Roger Federer in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Nick Kyrgios returns the ball to Roger Federer in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
Roger Federer reacts at the quarterfinal match against Guido Pella during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts at the quarterfinal match against Guido Pella during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts at the quarterfinal match against Guido Pella during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer plays against Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer plays against Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer plays against Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Tennis - ATP World Tour Finals
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Tennis - ATP World Tour Finals
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Tennis - ATP World Tour Finals
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Roger Federer returns the ball to Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer rejoint les demies à Stuttgart/Photo prise le 17 mars 2018/REUTERS/USA Today Sports
Roger Federer à une victoire de la place de numéro 1
Roger Federer rejoint les demies à Stuttgart/Photo prise le 17 mars 2018/REUTERS/USA Today Sports
Roger Federer returns the ball to Guido Pella in their quarterfinal match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Roger Federer serves to Mischa Zverev during their match, at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match, at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match, at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open
Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Roger Federer serves to Mischa Zverev during their match the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer, left, greets Mischa Zverev, right, after Federer beat Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer, left, greets Mischa Zverev, right, after Federer beat Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer, left, greets Mischa Zverev, right, after Federer beat Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer of Switzerland hits a forehand against Thanasi Kokkinakis of Australia (not pictured) on day five of the Miami Open at Tennis Center at Crandon Park. Kokkinakis won 3-6, 6-3, 7-6(4). Mandatory Credit: Geoff Burke-USA TODAY Sports
Tennis: Miami Open
Roger Federer of Switzerland hits a forehand against Thanasi Kokkinakis of Australia (not pictured) on day five of the Miami Open at Tennis Center at Crandon Park. Kokkinakis won 3-6, 6-3, 7-6(4). Mandatory Credit: Geoff Burke-USA TODAY Sports
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - Australian Open - Men's singles final - Rod Laver Arena, Melbourne, Australia, January 28, 2018. Switzerland's Roger Federer celebrates winning the final against Croatia's Marin Cilic. REUTERS/Issei Kato
Tennis - Australian Open - Men's singles final - Rod Laver Arena, Melbourne, Australia
Tennis - Australian Open - Men's singles final - Rod Laver Arena, Melbourne, Australia, January 28, 2018. Switzerland's Roger Federer celebrates winning the final against Croatia's Marin Cilic. REUTERS/Issei Kato
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Roger Federer reacts during the final tennis match against Milos Raonic at the ATP Mercedes Cup in Stuttgart, Sunday June 17, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts during the final tennis match against Milos Raonic at the ATP Mercedes Cup in Stuttgart, Sunday June 17, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts during the final tennis match against Milos Raonic at the ATP Mercedes Cup in Stuttgart, Sunday June 17, 2018. (Marijan Murat/dpa via AP)
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer celebrates winning the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Milos Raonic returns the ball to Roger Federer during the final of the ATP Mercedes Cup in Stuttgart, Sunday June 17, 2018. (Marijan Murat/dpa via AP)
Milos Raonic returns the ball to Roger Federer during the final of the ATP Mercedes Cup in Stuttgart, Sunday June 17, 2018. (Marijan Murat/dpa via AP)
Milos Raonic returns the ball to Roger Federer during the final of the ATP Mercedes Cup in Stuttgart, Sunday June 17, 2018. (Marijan Murat/dpa via AP)
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Canada's Milos Raonic in action during the final against Switzerland's Roger Federer REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Canada's Milos Raonic in action during the final against Switzerland's Roger Federer REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Canada's Milos Raonic reacts during the final against Switzerland's Roger Federer REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Canada's Milos Raonic reacts during the final against Switzerland's Roger Federer REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Canada's Milos Raonic in action during the final against Switzerland's Roger Federer REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Canada's Milos Raonic in action during the final against Switzerland's Roger Federer REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Fans display banners referencing Roger Federer during the final between Switzerland's Roger Federer and Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Fans display banners referencing Roger Federer during the final between Switzerland's Roger Federer and Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Switzerland's Roger Federer in action during the final against Canada's Milos Raonic REUTERS/Ralph Orlowski
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Fans display a banner of Roger Federer during the final between Switzerland's Roger Federer and Canada's Milos Raonic REUTERS/Ralph Orlowski
ATP 250 - Stuttgart Open
Tennis - ATP 250 - Stuttgart Open - Tennis Club Weissenhof, Stuttgart, Germany - June 17, 2018 Fans display a banner of Roger Federer during the final between Switzerland's Roger Federer and Canada's Milos Raonic REUTERS/Ralph Orlowski
Roger Federer of Switzerland hits a forehand against Thanasi Kokkinakis of Australia (not pictured) on day five of the Miami Open at Tennis Center at Crandon Park. Kokkinakis won 3-6, 6-3, 7-6(4). Geoff Burke-USA TODAY Sports
Tennis: Miami Open
Roger Federer of Switzerland hits a forehand against Thanasi Kokkinakis of Australia (not pictured) on day five of the Miami Open at Tennis Center at Crandon Park. Kokkinakis won 3-6, 6-3, 7-6(4). Geoff Burke-USA TODAY Sports
Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/Files
Tennis - ATP 500 - Rotterdam Open
Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/Files
Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/Files
Tennis - ATP 500 - Rotterdam Open
Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/Files
Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/Files
Tennis - ATP 500 - Rotterdam Open
Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/Files
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
Nick Kyrgios laughs during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios laughs during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios laughs during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios returns a ball during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios returns a ball during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Nick Kyrgios returns a ball during the semifinal tennis match against Roger Federer during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns a ball during the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer celebrates winning the semifinal tennis match against Nick Kyrgios during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Nick Kyrgios returns the ball to Roger Federer in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Nick Kyrgios returns the ball to Roger Federer in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Nick Kyrgios returns the ball to Roger Federer in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
Roger Federer returns the ball to Nick Kyrgios in their semifinal tennis match during the ATP Mercedes Cup in Stuttgart, Saturday June 16, 2018.(Marijan Murat/dpa via AP)
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 16, 2018 Roger Federer of Switzerland celebrates after defeating Robin Haase of the Netherlands. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren/File Photo
Roger Federer reacts at the quarterfinal match against Guido Pella during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts at the quarterfinal match against Guido Pella during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts at the quarterfinal match against Guido Pella during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer plays against Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer plays against Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer plays against Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Tennis - ATP World Tour Finals
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Tennis - ATP World Tour Finals
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Tennis - ATP World Tour Finals
FILE PHOTO: ATP World Tour Finals - The O2 Arena, London, Britain - November 18, 2017 Switzerland's Roger Federer in action during his semi final match against Belgium's David Goffin REUTERS/Toby Melville
Roger Federer returns the ball to Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal tennis match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer rejoint les demies à Stuttgart/Photo prise le 17 mars 2018/REUTERS/USA Today Sports
Roger Federer à une victoire de la place de numéro 1
Roger Federer rejoint les demies à Stuttgart/Photo prise le 17 mars 2018/REUTERS/USA Today Sports
Roger Federer returns the ball to Guido Pella in their quarterfinal match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
Roger Federer returns the ball to Guido Pella in their quarterfinal match during the ATP Mercedes Cup in Stuttgart, Friday June 15, 2018. (Marijan Murat/dpa via AP)
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Roger Federer serves to Mischa Zverev during their match, at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match, at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match, at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open
FILE PHOTO: Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Tennis - ATP 500 - Rotterdam Open
Tennis - ATP 500 - Rotterdam Open - Final - Ahoy, Rotterdam, Netherlands - February 18, 2018 - Roger Federer of Switzerland celebrates after winning against Grigor Dimitrov of Bulgaria. REUTERS/Michael Kooren
Roger Federer serves to Mischa Zverev during their match the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer serves to Mischa Zverev during their match the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Mischa Zverev returns the ball to Roger Federer during their match at the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer, left, greets Mischa Zverev, right, after Federer beat Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer, left, greets Mischa Zverev, right, after Federer beat Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer, left, greets Mischa Zverev, right, after Federer beat Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer celebrates as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)
Roger Federer reacts as he defeats Mischa Zverev during the ATP Mercedes Cup tournament in Stuttgart, Germany, Wednesday, June 13, 2018. (Marijan Murat/dpa via AP)

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