see more

PARIS, FRANCE - MAY 25: Kei Nishikori of Japan hits a forehand during the men's singles round two match between Kei Nishikori of Japan and Sergiy Stakhovsky of Ukraine on day four of the French Open at Roland Garros on May 25, 2011 in Paris, France. (Photo by Tommy Hindley/Professional Sport/Popperfoto via Getty Images/Getty Images)

PARIS, FRANCE - MAY 25: Kei Nishikori of Japan hits a forehand during the men's singles round two match between Kei Nishikori of Japan and Sergiy Stakhovsky of Ukraine on day four of the French Open at Roland Garros on May 25, 2011 in Paris, France. (Photo by Tommy Hindley/Professional Sport/Popperfoto via Getty Images/Getty Images)