Caroline Wozniacki

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Caroline Wozniacki, of Denmark, returns a shot from Johanna Konta, of Britain, during the women's singles final tennis match at the Miami Open, Saturday, April 1, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Johanna Konta, of Britain, left, and Caroline Wozniacki, of Denmark, shake hands after Konta defeated Wozniacki 6-4, 6-3, in the women's singles final tennis match at the Miami Open, Saturday, April 1, 2017 in Key Biscayne, Fla. (AP Photo/Lynne Sladky)

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Johanna Konta, of Britain, reacts after defeating Caroline Wozniacki, of Denmark, 6-4, 6-3, in the women's singles final tennis match at the Miami Open, Saturday, April 1, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Fans of Johanna Konta, of Britain, cheer during Konta's women's singles final tennis match against Caroline Wozniacki, of Denmark, at the Miami Open, Saturday, April 1, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Johanna Konta, of Britain, reacts after defeating Caroline Wozniacki, of Denmark, 6-4, 6-3, in the women's singles final tennis match at the Miami Open, Saturday, April 1, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Johanna Konta, of Britain, returns a shot from Caroline Wozniacki, of Denmark, during the women's singles final tennis match at the Miami Open, Saturday, April 1, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Caroline Wozniacki, of Denmark, serves to Karolina Pliskova, of the Czech Republic, during a tennis match at the Miami Open, Thursday, March 30, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Karolina Pliskova, of the Czech Republic, reacts after losing a point to Caroline Wozniacki, of Denmark, during a tennis match at the Miami Open, Thursday, March 30, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Caroline Wozniacki, of Denmark, serves to Karolina Pliskova, of the Czech Republic, during a tennis match at the Miami Open, Thursday, March 30, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Caroline Wozniacki, of Denmark, returns a shot from Karolina Pliskova, of the Czech Republic, during a tennis match at the Miami Open, Thursday, March 30, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Caroline Wozniacki, of Denmark, waves at the crowd after defeating Lucie Safarova, of the Czech Republic, 6-4, 6-3 during the Miami Open tennis tournament, Tuesday, March 28, 2017, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

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Caroline Wozniacki, of Denmark, returns a shot from Garbine Muguruza, of Spain, during a tennis match at the Miami Open, Monday, March 27, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Caroline Wozniacki, of Denmark, returns a shot from Garbine Muguruza, of Spain, during a tennis match at the Miami Open, Monday, March 27, 2017, in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Garbine Muguruza, of Spain, leaves the court after she retired from a tennis match against Caroline Wozniacki, of Denmark, at the Miami Open, Monday, March 27, 2017 in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)

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Caroline Wozniacki, of Denmark, shakes hands with Varvara Lepchenko, of the United States, after defeating her 6-1, 6-2 during the Miami Open tennis tournament, Thursday, March 23, 2017, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

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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)

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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)

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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)

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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)

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Serena Williams, reacts after a shot against Caroline Wozniacki, of Denmark, during the championship match of the 2014 U.S. Open tennis tournament, Sunday, Sept. 7, 2014, in New York. (AP Photo/Darron Cummings)