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FILE - In this July 6, 2014, file photo, Novak Djokovic, of Serbia, celebrates with his coach Boris Becker, right, in the players box after defeating Roger Federer of Switzerland in the men's singles final at the All England Lawn Tennis Championships in Wimbledon, London. Djokovic says he and coach Boris Becker are splitting up after three seasons together. Djokovic posted a statement on Facebook on Tuesday, Dec. 6, 2016, saying the duo "jointly decided to end our cooperation." (AP Photo/Pavel Golovkin, File)

Roger Federer

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