...the ball to Czech Republic's Radek Stepanek during the semi final match at the Swiss Indoors ATP tennis tournament on November 7, 2009 in Basel. Djokovic won 6-7 (4/7), 7-5, 6...

...Republic's Radek Stepanek (out of camera range) during their semi-final match at the Swiss Indoors ATP tennis tournament on November 7, 2009 in Basel. AFP PHOTO / FABRICE COFFRINI (Photo credit should read FABRICE...

...Spanish Rafael Nadal eyes the ball during his quarterfinal match of the ATP Madrid Open claycourt tournament against Spanish Fernando Verdasoon May 15, 2009. Nadal won 6-4, 7-5...

...Roddick receives treatment from medical personnel during a match against Stanislas Wawrinka of Switzerland at the Shanghai ATP Masters 1000 tennis tournament in Shanghai, China, Tuesday, Oct. 13, 2009. Roddick retired in the first set...

...as he lost a point against Nikolay Davydenko of Russia during the singles final match of Shanghai ATP Masters 1000 tennis tournament at Qizhong Stadium Sunday, Oct. 18, 2009 in Shanghai, China. Davydenko won 7...

...winner's trophy after defeating Rafael Nadal of Spain in the men's singles final at the ATP Shanghai Masters tennis tournament in Shanghai on October 18, 2009. Davydenko defeated top-seeded Nadal 7-6...

...the stands following victory over Rafael Nadal of Spain in the men's singles final at the ATP Shanghai Masters tennis tournament in Shanghai on October 18, 2009. Davydenko defeated Nadal 7-6 (7/3...

...hits a backhand return against James Blake of the US 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...

SHANGHAI, CHINA - OCTOBER 13: Andy Rodick of the United States receives treatment from ATP trainer Michael Novotny before retiring from his match against Stanilas Wawrinka of Switzerland during day three of...

Adam Helfant, the new CEO of the ATP men's tennis tour, speaks during a press conference at the U.S. Open tennis tournament in...

...the Agora of the Ciudad de las Artes y las Ciencias after wining his final match at ATP 500 World Tour Valencia Open tennis tournament against Mikhail Youzhny, from Russia, in Valencia, Spain, Sunday, Nov...

...as Croatia's Goran Ivanisevic, right, holds the second place award after the final match of the ATP Champions Tour tennis tournament in Chengdu, China, Sunday, Nov. 8, 2009. Enqvist won the match 7-5...

Andy Murray from Great Britain celebrates his victory at the end of the final match at ATP 500 World Tour Valencia Open tennis tournament against Mikhail Youzhny, from Russia, in Valencia, Spain, Sunday, Nov...

...Youzhny from Russia returns the ball to Andy Murray from Great Britain, during the final match at ATP 500 World Tour Valencia Open tennis tournament in Valencia, Spain, Sunday, Nov. 8, 2009. Murray won 6...

...Murray from Great Britain, left, celebrates after his victory at the end of the final match at ATP 500 World Tour Valencia Open tennis tournament against Mikhail Youzhny, from Russia, in Valencia, Spain, Sunday, Nov...