Novak Djokovic celebrates his win over Richard Gasquet during their fourth round match of the French Open tennis tournament, at the Roland Garros stadium in Paris, Sunday, May 29, 2011. No. 2 Djokovic will play No. 3 Roger Federer in the semifinal match Friday. (AP Photo/Michel Euler)
Roger Federer of Switzerland returns the ball to Richard Gasquet of France during their match of the Paris Tennis Masters tournament, Wednesday, Nov. 10, 2010. (AP Photo/Lionel Cironneau)
Novak Djokovic of Serbia greets spectators as he defeats Richard Gasquet of France in his men's singles round three match of the Shanghai Masters tennis tournament in Shanghai, China, Thursday, Oct. 14, 2010. Djokovic won 6-1, 6-1. (AP Photo/Eugene Hoshiko)
