Wozniacki reached the U.S. Open final in 2009 .
Seven years after playing Wozniacki 's first grand slam , at Wimbledon , the girlfriend of golf major champion Rory McIlroy has yet to crack the code to winning one Wozniacki 's her own .
Wozniacki reached the U.S. Open final in 2009 but seven years after playing her first grand slam , at Wimbledon , the girlfriend of golf major champion Rory McIlroy has yet to crack the code to winning one of her own .