U.S. Open tennis 2012 (103 images)

Stefan Kendal Gordy of LMFAO watches Kim Clijsters of Belgium play Laura Robson of Great Britain at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the Billie Jean King National Tennis Center in New York City on August 29, 2012. With the loss Kim Clijsters officially retired from professional tennis. UPI/John Angelillo

Laura Robson of Great Britain reacts after match point in her victory over Kim Clijsters of Belgium at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the Billie Jean King National Tennis Center in New York City on August 29, 2012. With the loss Kim Clijsters officially retired from professional tennis. UPI/John Angelillo

Kim Clijsters of Belgium serves in the first set in her defeat to Laura Robson of Great Britain at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the Billie Jean King National Tennis Center in New York City on August 29, 2012. With the loss Kim Clijsters officially retired from professional tennis. UPI/John Angelillo

Venus Williams (L) and her sister Serena, USA, chat before the start of their women's double match against Lindsey Lee-Waters and Megan Moulton-Levy of the USA at the 2012 U.S. Open held at the National Tennis Center on August 29, 2012 in New York. UPI Photo/Monika Graff