Caroline Wozniacki

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Tennis player Caroline Wozniacki watches her fiancee Rory McIlroy, of Northern Ireland, during the first round of the Masters golf tournament Thursday, April 10, 2014, in Augusta, Ga. (AP Photo/Darron Cummings)

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Rory McIlroy, of Northern Ireland, walks with his fiancee and tennis player Caroline Wozniacki after Wozniacki putted on the ninth hole during the par three competition at the Masters golf tournament Wednesday, April 9, 2014, in Augusta, Ga. (AP Photo/David J. Phillip)

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Rory McIlroy, of Northern Ireland, celebrates with his fiancee and tennis player Caroline Wozniacki after Wozniacki putted on the ninth hole during the par three competition at the Masters golf tournament Wednesday, April 9, 2014, in Augusta, Ga.(AP Photo/Chris Carlson)

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Tennis player Caroline Wozniacki and her fiancee Rory McIlroy, of Northern Ireland, celebrate after Wozniacki putted on the ninth hole during the par three competition at the Masters golf tournament Wednesday, April 9, 2014, in Augusta, Ga. (AP Photo/David J. Phillip)

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Tennis player Caroline Wozniacki wears her engagement ring from her fiancee Rory McIlroy, of Northern Ireland, during the par three competition at the Masters golf tournament Wednesday, April 9, 2014, in Augusta, Ga. (AP Photo/Darron Cummings)

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Tennis player Caroline Wozniacki high fives with her fiancee Rory McIlroy, of Northern Ireland, after Wozniacki putted on the ninth hole during the par three competition at the Masters golf tournament Wednesday, April 9, 2014, in Augusta, Ga. (AP Photo/David J. Phillip)