NEW YORK – SEPTEMBER 13: Caroline Wozniacki of Denmark returns a shot to Kim Clijsters of Belgium during the Women?s Singles final on day fourteen of the 2009 U.S. Open at the USTA Billie Jean King National Tennis Center on September 13, 2009 in the Flushing neighborhood of the Queens borough of New York City. Clijsters defeated Wozniacki 7-5, 6-3. (Photo by Al Bello/Getty Images)