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PARIS - JUNE 05: Roger Federer of Switzerland leans on the net at the end of the dramatic Men's Singles Semi Final match against Juan Martin Del Potro of Argentina on day thirteen of the French Open at Roland Garros on June 5, 2009 in Paris, France. (Photo by Tommy Hindley/Professional Sport/Popperfoto via Getty Images/Getty Images)

PARIS - JUNE 05: Roger Federer of Switzerland leans on the net at the end of the dramatic Men's Singles Semi Final match against Juan Martin Del Potro of Argentina on day thirteen of the French Open at Roland Garros on June 5, 2009 in Paris, France.  (Photo by Tommy Hindley/Professional Sport/Popperfoto via Getty Images/Getty Images)