A fan holds up a sign for Pablo Carreno Busta, of Spain, during his match against Pablo Cuevas, of Uruguay, at the BNP Paribas Open tennis tournament, Thursday, March 16, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Pablo Carreno Busta, of Spain, returns a shot to Pablo Cuevas, of Uruguay, at the BNP Paribas Open tennis tournament, Thursday, March 16, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Pablo Cuevas, of Uruguay, dives to return a shot against Pablo Carreno Busta, of Spain, at the BNP Paribas Open tennis tournament, Thursday, March 16, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Caroline Wozniacki, of Denmark, returns a shot to Kristina Mladenovic, of France, at the BNP Paribas Open tennis tournament, Thursday, March 16, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Caroline Wozniacki, of Denmark, returns a shot to Kristina Mladenovic, of France, at the BNP Paribas Open tennis tournament, Thursday, March 16, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Kristina Mladenovic, of France, returns a shot against Caroline Wozniacki, of Denmark, at the BNP Paribas Open tennis tournament, Thursday, March 16, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Kristina Mladenovic, of France, returns a shot to Caroline Wozniacki, of Denmark, at the BNP Paribas Open tennis tournament, Thursday, March 16, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Stanislas Wawrinka, of Switzerland, returns a shot to Yoshihito Nishioka, of Japan, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Yoshihito Nishioka, of Japan, returns a shot to Stanislas Wawrinka, of Switzerland, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Roger Federer, of Switzerland, celebrates after beating Rafael Nadal, of Spain, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Roger Federer, of Switzerland, returns a shot against Rafael Nadal, of Spain, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Rafael Nadal, of Spain, serves to Roger Federer, of Switzerland, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Roger Federer, of Switzerland, returns a shot to Rafael Nadal, of Spain, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Nick Kyrgios, of Australia, returns a shot against Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Novak Djokovic, of Serbia, reacts after losing a point to Nick Kyrgios, of Australia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Novak Djokovic, of Serbia, returns a shot to Nick Kyrgios, of Australia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Nick Kyrgios, of Australia, celebrates after beating Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Donald Young returns a shot to Kei Nishikori, of Japan, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Arizona Cardinals football player Larry Fitzgerald watches action at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Anastasia Pavlyuchenkova, of Russia, serves to Svetlana Kuznetsova, of Russia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)