U.S. Open 2013 (96 images)

Serena Williams (USA) serves to Galina Voskoboeva of Kazakhstan in the first set during round-two action at the U.S. Open Championship held at the USTA Billie Jean King National Tennis Center on August 29, 2013 in New York City. UPI Photo/Monika Graff

Andy Murray reacts after winning a pint in the second set against Michael Llodra of France in their first round match on day three at the U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center in New York City on August 28, 2013. UPI/John Angelillo

James Blake reacts as he speaks to Mary Joe Fernandez on the court after his defeat to Ivo Karlovic of Croatia in their first round match on day three at the U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center in New York City on August 28, 2013. Karlovic defeated Blake in 5 sets after Blake announces his retirement from tennis after U.S. Open. UPI/John Angelillo

Jie Zheng of China serves in the third set in her victory over Venus Williams in the second round in Louis Armstrong Stadium on day three at the U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center in New York City on August 28, 2013. UPI/John Angelillo