Caroline Wozniacki

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Caroline Wozniacki, of Denmark, reacts to losing a point to Bojana Jovanovski, of Serbia, during a second-round match at the BNP Paribas Open tennis tournament on Friday, March 7, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Caroline Wozniacki, of Denmark, hits tennis balls into the crowd as the sun sets following her match against Bojana Jovanovski, of Serbia, at the BNP Paribas Open tennis tournament, Friday, March 7, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

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Rory McIlroy's fiancee, tennis player Caroline Wozniacki, of Denmark, watches as he prepares to play on the fourth hole during the final round of the Honda Classic golf tournament on Sunday, March 2, 2014, in Palm Beach Gardens, Fla. (AP Photo/Lynne Sladky)

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Tennis player Caroline Wozniacki watches her fiancee Rory McIlroy play on the sixth hole during the third round of the Honda Classic golf tournament, Saturday, March 1, 2014 in Palm Beach Gardens, Fla. (AP Photo/Wilfredo Lee)

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Tennis player Caroline Wozniacki, of Denmark, watches her fiancee Rory McIlroy play on the 14th hole during the second round of the Honda Classic golf tournament, Friday, Feb. 28, 2014 in Palm Beach Gardens, Fla. (AP Photo/Wilfredo Lee)