PARIS - NOVEMBER 11: James Blake of the U.S. hits a return against Andy Murray of Great Britain during the ATP Masters Series at the Palais Omnisports De Paris-Bercy on November 11, 2009 in Paris, France. (Photo by Clive Rose/Getty Images)

PARIS - NOVEMBER 11: James Blake of the U.S. reaches for a return against Andy Murray of Great Britain during the ATP Masters Series at the Palais Omnisports De Paris-Bercy on November 11, 2009 in Paris, France. (Photo by Clive Rose/Getty Images)

PARIS - NOVEMBER 11: James Blake of the U.S. hits against Andy Murray of Great Britain during the ATP Masters Series at the Palais Omnisports De Paris-Bercy on November 11, 2009 in Paris, France. (Photo by Clive Rose/Getty Images)

BASEL, SWITZERLAND - NOVEMBER 04: James Blake of USA plays a backhand in his match against Jeremy Chardy of France during Day Three of the Davidoff Swiss Indoors Tennis at St Jakobshalle on November 4, 2009 in Basel, Switzerland. (Photo by Julian Finney/Getty Images)

BASEL, SWITZERLAND - NOVEMBER 04: James Blake of USA plays a volley in his match against Jeremy Chardy of France during Day Three of the Davidoff Swiss Indoors Tennis at St Jakobshalle on November 4, 2009 in Basel, Switzerland. (Photo by Julian Finney/Getty Images)

BASEL, SWITZERLAND - NOVEMBER 04: James Blake of USA plays a volley in his match against Jeremy Chardy of France during Day Three of the Davidoff Swiss Indoors Tennis at St Jakobshalle on November 4, 2009 in Basel, Switzerland. (Photo by Julian Finney/Getty Images)

BASEL, SWITZERLAND - NOVEMBER 04: James Blake of USA plays a volley in his match against Jeremy Chardy of France during Day Three of the Davidoff Swiss Indoors Tennis at St Jakobshalle on November 4, 2009 in Basel, Switzerland. (Photo by Julian Finney/Getty Images)

SHANGHAI, CHINA - OCTOBER 14: James Blake of the United States returns a shot to Rafael Nadal of Spain during day four of 2009 Shanghai ATP Masters 1000 at the Qi Zhong Tennis Centre on October 14, 2009 in Shanghai, China. (Photo by Victor Fraile/Getty Images)

James Blake of the US hits a backhand return against Rafael Nadal of Spain during their second round match at the ATP Masters tennis tournament in Shanghai on October 14, 2009. Nadal defeated Blake 6-2, 6-7 (7/4), 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

SHANGHAI, CHINA - OCTOBER 14: James Blake of the United States lunges for a shot against Rafael Nadal of Spain during the 2009 Shanghai ATP Masters 1000 at Qi Zhong Tennis Centre on October 14, 2009 in Shanghai, China. (Photo by Matthew Stockman/Getty Images)

James Blake of the US hits a forehand return against Rafael Nadal of Spain during their second round match at the ATP Masters tennis tournament in Shanghai on October 14, 2009. Nadal defeated Blake 6-2, 6-7 (7/4), 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

SHANGHAI, CHINA - OCTOBER 14: James Blake of the United States leaps for a shot against Rafael Nadal of Spain during the 2009 Shanghai ATP Masters 1000 at Qi Zhong Tennis Centre on October 14, 2009 in Shanghai, China. (Photo by Matthew Stockman/Getty Images)

SHANGHAI, CHINA - OCTOBER 14: James Blake of the United States returns a shot to Rafael Nadal of Spain during the 2009 Shanghai ATP Masters 1000 at Qi Zhong Tennis Centre on October 14, 2009 in Shanghai, China. (Photo by Matthew Stockman/Getty Images)

SHANGHAI, CHINA - OCTOBER 14: James Blake of the United Statesreacts to a lost point against Rafael Nadal of Spain during the 2009 Shanghai ATP Masters 1000 at Qi Zhong Tennis Centre on October 14, 2009 in Shanghai, China. (Photo by Matthew Stockman/Getty Images)

SHANGHAI, CHINA - OCTOBER 12: James Blake of USA returns a shot to Ivo Karlovic of Croatia during day two of 2009 Shanghai ATP Masters 1000 at the Qi Zhong Tennis Centre in Shanghai. (Photo by Victor Fraile/Getty Images)

SHANGHAI, CHINA - OCTOBER 12: James Blake of the US acknowledges the crowd after defeating Ivo Karlovic of Croatia during day two of 2009 Shanghai ATP Masters 1000 at the Qi Zhong Tennis Centre in Shanghai. (Photo by Victor Fraile/Getty Images)

SHANGHAI, CHINA - OCTOBER 12: James Blake of USA returns a shot to Ivo Karlovic of Croatia during day two of 2009 Shanghai ATP Masters 1000 at the Qi Zhong Tennis Centre in Shanghai. (Photo by Victor Fraile/Getty Images)

SHANGHAI, CHINA - OCTOBER 12: James Blake of USA returns a shot to Ivo Karlovic of Croatia during day two of 2009 Shanghai ATP Masters 1000 at the Qi Zhong Tennis Centre in Shanghai. (Photo by Victor Fraile/Getty Images)

SHANGHAI, CHINA - OCTOBER 12: James Blake of USA returns a shot to Ivo Karlovic of Croatia during day two of 2009 Shanghai ATP Masters 1000 at the Qi Zhong Tennis Centre in Shanghai. (Photo by Victor Fraile/Getty Images)

US tennis player James Blake eyes the ball before he hits a return against Ivo Karlovic of Croatia during their first round match at the ATP Shanghai Masters tennis tournament in Shanghai on October 12, 2009. Blake won 3-6, 7-6, 6-3. AFP PHOTO / PHILIPPE LOPEZ (Photo credit should read PHILIPPE LOPEZ/AFP/Getty Images)

US tennis player James Blake hits a return against Ivo Karlovic of Croatia during their first round match at the ATP Shanghai Masters tennis tournament in Shanghai on October 12, 2009. Blake won 3-6, 7-6, 6-3. AFP PHOTO / PHILIPPE LOPEZ (Photo credit should read PHILIPPE LOPEZ/AFP/Getty Images)

US tennis player James Blake hits a return against Ivo Karlovic of Croatia during their first round match at the ATP Shanghai Masters tennis tournament in Shanghai on October 12, 2009. Blake was leading 3/6,7/6,5/3 in the third and last set. AFP PHOTO / PHILIPPE LOPEZ (Photo credit should read PHILIPPE LOPEZ/AFP/Getty Images)

BEIJING - OCTOBER 08: James Blake of USA misses a shot against Rafael Nadal of Spain in his second round match during day seven of the 2009 China Open at the National Tennis Centre on October 8, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - OCTOBER 08: James Blake of USA returns a shot against Rafael Nadal of Spain in his second round match during day seven of the 2009 China Open at the National Tennis Centre on October 8, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

James Blake of the US returns a ball against Rafael Nadal of Spain during a second round match at China Open 2009, at the National Tennis Center in Beijing on October 8, 2009. Nadal beat Blake 7-5, 6-7, 6-3. AFP PHOTO/GOH CHAI HIN (Photo credit should read GOH CHAI HIN/AFP/Getty Images)

James Blake of the US returns a ball against Rafael Nadal of Spain during a second round match at China Open 2009, at the National Tennis Center in Beijing on October 8, 2009. Nadal beat Blake 7-5, 6-7, 6-3. AFP PHOTO/GOH CHAI HIN (Photo credit should read GOH CHAI HIN/AFP/Getty Images)

James Blake of USA returns a ball against Rafael Nadal of Spain during a second round match at China Open 2009, at the National Tennis Center in Beijing on October 8, 2009. Nadal beat Blake 7-5, 6-7, 6-3. AFP PHOTO/GOH CHAI HIN (Photo credit should read GOH CHAI HIN/AFP/Getty Images)

James Blake of the US returns a shot against Florian Mayer of German Maria Sharapova of Russia celebrates after beating Victoria Azarenka of Belarus during the second round match at the China Open 2009 in Beijing on October 6, 2009. James Blake won 6-3, 3-6, 6-3. AFP PHOTO/LIU Jin (Photo credit should read LIU JIN/AFP/Getty Images)