Mark J. Terrill
AP Photo - Samantha Stosur, of Australia, returns a shot against Peng Shuai, of China, during their match at the BNP Paribas Open tennis tournament, Monday, March 11, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Rafael Nadal, of Spain, returns a shot to Roger Federer, of Switzerland, during their match at the BNP Paribas Open tennis tournament, Thursday, March 14, 2013, in Indian Wells, Calif.
Mark J. Terrill
Foto AP - La bielorrusa Victoria Azarenka devuelve una volea a la polaca Urszula Radwanska en el Masters de Indian Wells, el martes 12 de marzo de 2013, en Indian Wells, California.
Mark J. Terrill
AP Photo - Victoria Azarenka, of Belarus, listens during a news conference to announce that she had withdrawn from the BNP Paribas Open tennis tournament due to an ankle injury, Thursday, March 14, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Victoria Azarenka, of Belarus, pauses during a news conference to announce that she has withdrawn from the BNP Paribas Open tennis tournament due to an ankle injury, Thursday, March 14, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Roger Federer, of Switzerland, returns a shot to Rafael Nadal, of Spain, during their match at the BNP Paribas Open tennis tournament on Thursday, March 14, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Rafael Nadal, of Spain, returns a shot to Roger Federer, of Switzerland, during their match at the BNP Paribas Open tennis tournament, Thursday, March 14, 2013, in Indian Wells, Calif.
Mark J. Terrill
Foto AP - El español Rafael Nadal regresa un disparo del suizo Roger Federer durante su duelo en el Masters de Indian Wells, California, el jueves 14 de marzo de 2013. Nadal eliminó a Federer en dos sets.
Mark J. Terrill
AP Photo - Rafael Nadal, right, of Spain, hugs Roger Federer, of Switzerland, after Nadal's win at the BNP Paribas Open tennis tournament, Thursday, March 14, 2013, in Indian Wells, Calif. Nadal won 6-4, 6-2.
Mark J. Terrill
AP Photo - Novak Djokovic, of Serbia, watches a return to Jo-Wilfried Tsonga, of France, at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Novak Djokovic, of Serbia, returns a shot against Jo-Wilfried Tsonga, of France, during their match at the BNP Paribas Open tennis tournament on Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Jo-Wilfried Tsonga, of France, returns a shot to Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Andy Murray, of Great Britain, returns a shot to Juan Martin del Potro, of Argentina, during their match at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Juan Martin del Potro, of Argentina, lifts the glasses of linesman Marcos Cook during his match against Andy Murray, of Great Britain, at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Juan Martin del Potro, of Argentina, returns a shot to Andy Murray, of Great Britain, during their match at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.