Wells

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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)

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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)

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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)

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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)

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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)

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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)

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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)

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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)

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Roger Federer, of Switzerland, returns a shot against Steve Johnson at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Peng Shuai, of China, returns a shot to Venus Williams at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Venus Williams returns a shot to Peng Shuai, of China, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Gilles Muller, of Luxembourg, returns a shot to Kei Nishikori, of Japan, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Fernando Verdasco, of Spain, returns a shot to Rafael Nadal, of Spain, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Rafael Nadal, of Spain, reacts after losing a point to Fernando Verdasco, of Spain, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Fernando Verdasco, of Spain, returns a shot to Rafael Nadal, of Spain, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Rafael Nadal, of Spain, returns a shot to Fernando Verdasco, of Spain, at the BNP Paribas Open tennis tournament, Tuesday, March 14, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Naomi Osaka, of Japan, returns a shot to Madison Keys at the BNP Paribas Open tennis tournament, Monday, March 13, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Madison Keys returns a shot to Naomi Osaka, of Japan, at the BNP Paribas Open tennis tournament, Monday, March 13, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Philipp Kohlschreiber, of Germany, reacts after losing a point to Stanislas Wawrinka, of Switzerland, at the BNP Paribas Open tennis tournament, Monday, March 13, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Dominic Thiem, of Austria, returns a shot against Mischa Zverev, of Germany, at the BNP Paribas Open tennis tournament, Monday, March 13, 2017, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)