US Open Tennis Championships

US Open Tennis Championships

Caroline Wozniacki looks on Shuai Peng of China who kneels on the ground after collapsing during in the second set of their semifinal match at the USTA Billie Jean King National Tennis Center in New York City on September 5, 2014. Caroline Wozniacki won the first set and was leading in the second when Peng Shuai retired due to on-court cramping. Wozniacki defeated Peng 7-6, 4-3. UPI/Monika Graff