Tommy Haas, of Germany, reaches for the ball against Roger Federer, of Switzerland, during a fourth-round match at the BNP Paribas Open tennis tournament on Wednesday, March 12, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Roger Federer, of Switzerland, returns a shot against Tommy Haas, of Germany, during a match at the BNP Paribas Open tennis tournament on Wednesday, March 12, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Dmitry Tursunov, of Russia, hits to Roger Federer, of Switzerland, during a third round match at the BNP Paribas Open tennis tournament, Monday, March 10, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Roger Federer, of Switzerland, hits to Dmitry Tursunov, of Russia, during a third round match at the BNP Paribas Open tennis tournament, Monday, March 10, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Roger Federer, of Switzerland, hits to Dmitry Tursunov, of Russia, during a third round match at the BNP Paribas Open tennis tournament, Monday, March 10, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)