Anastasia Pavlyuchenkova

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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)

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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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Sloane Stephens poses with the trophy after she defeated Anastasia Pavlyuchenkova 6-1, 6-2, in the women's singles final at the Citi Open on Sunday. Stephens was competing in her first career WTA final. (Associated Press)

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Karolina Pliskova of Czech Republic returns the ball to Anastasia Pavlyuchenkova of Russia during the second day of Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Monday, Feb. 16, 2015. (AP Photo/Kamran Jebreili)

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Japan's Kimiko Date-Krumm serves the ball to Russia's Anastasia Pavlyuchenkova during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/Darko Vojinovic)

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Japan's Kimiko Date-Krumm returns the ball to Russia's Anastasia Pavlyuchenkova during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/Darko Vojinovic)

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Japan's Kimiko Date-Krumm returns the ball to Russia's Anastasia Pavlyuchenkova during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/Darko Vojinovic)