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 - 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 - 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 - Caroline Wozniacki, of Denmark, returns a shot to Angelique Kerber, of Germany, at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Angelique Kerber, of Germany, returns a shot to Caroline Wozniacki, of Denmark, during their match 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 - 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 - 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.
Mark J. Terrill
AP Photo - Maria Kirilenko, of Russia, returns a shot to Maria Sharapova, of Russia, during their semifinal match at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Maria Sharapova, of Russia, returns a shot to Maria Kirilenko, of Russia, during their semifinal match at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Rafael Nadal, of Spain, returns a shot against Tomas Berdych, of the Czech Republic, during their match at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Tomas Berdych, of the Czech Republic, returns a shot against Rafael Nadal, of Spain, during their match at the BNP Paribas Open tennis tournament on Saturday, March 16, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Rafael Nadal, of Spain, serves against Tomas Berdych, of the Czech Republic, during their match at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Tomas Berdych, of the Czech Republic, returns a shot against Rafael Nadal, of Spain, during their match at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif.
Mark J. Terrill
AP Photo - Juan Martin del Potro, of Argentina, returns a shot to Novak Djokovic, of Serbia, in their semifinal match at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif. Del Potro won 4-6, 6-4, 6-4.
Mark J. Terrill
AP Photo - Juan Martin del Potro, of Argentina, celebrates winning a game over Novak Djokovic, of Serbia, in a semifinal at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif. Del Potro won 4-6, 6-4, 6-4.
Mark J. Terrill
AP Photo - Juan Martin del Potro, of Argentina, celebrates after defeating Novak Djokovic, of Serbia, in their semifinal match at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif. Del Potro won 4-6, 6-4, 6-4.
Mark J. Terrill
AP Photo - Novak Djokovic, of Serbia, returns a shot to Juan Martin del Potro, of Argentina, in their semifinal match at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif. Del Potro won 4-6, 6-4, 6-4.
Mark J. Terrill
AP Photo - Novak Djokovic, of Serbia, returns a shot to Juan Martin del Potro, of Argentina, in their semifinal match at the BNP Paribas Open tennis tournament on Saturday, March 16, 2013, in Indian Wells, Calif. Del Potro won 4-6, 6-4, 6-4.
Mark J. Terrill
AP Photo - Novak Djokovic, of Serbia, reacts after losing a point to Juan Martin del Potro, of Argentina, in their semifinal match at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif. Del Potro won 4-6, 6-4, 6-4.
Mark J. Terrill
AP Photo - Juan Martin del Potro, of Argentina, returns a shot to Novak Djokovic, of Serbia, in a semifinal at the BNP Paribas Open tennis tournament, Saturday, March 16, 2013, in Indian Wells, Calif. Del Potro won 4-6, 6-4, 6-4.