Caroline Wozniacki plays Melanie Oudin in the quarter finals at the US Open Tennis Championships in New York

Caroline Wozniacki of Denmark reacts after defeating Melanie Oudin of the USA in their quarter final match in Arthur Ashe Stadium at the US Open Tennis Championships at the Billie Jean King National Tennis Center in New York on September 9, 2009. Wozniacki defeated Oudin 6-2, 6-2. UPI/John Angelillo