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)
Svetlana Kuznetsova, of Russia, returns a shot to Anastasia Pavlyuchenkova, of Russia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Svetlana Kuznetsova, of Russia, returns a shot to Anastasia Pavlyuchenkova, of Russia, at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Kei Nishikori, of Japan, returns a shot to Donald Young at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Donald Young reacts after losing a point 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)
Kei Nishikori, of Japan, returns a shot against Donald Young at the BNP Paribas Open tennis tournament, Wednesday, March 15, 2017, in Indian Wells, Calif. Nishikori won 6-2, 6-4. (AP Photo/Mark J. Terrill)
Juan Martin del Potro, of Argentina, serves to Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Novak Djokovic, of Serbia, returns a shot to Juan Martin del Potro, of Argentina, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Roger Federer, of Switzerland, returns a shot to Steve Johnson at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Steve Johnson returns a shot to Roger Federer, of Switzerland, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)