Sania Mirza serves to Flavia Pennetta during the second round of the U.S. Open in New York on Wednesday, September 2, 2009. Photo: AP
Juan Martin del Potro returns to Juan Monaco during the first round of the U.S. Open in New York. Photo: AP
Serena Williams sets to hit a back hand as she chases a shot by Melinda Czink at the U.S. Open in New York. Photo: AP
Roger Federer in action at the U.S. Open in New York. Photo: AP
Lleyton Hewitt returns to Juan Ignacio during the second round of the U.S. Open in New York. Photo: AP
Kim Clijsters reacts after her victory over Marion Bartoli at the U.S. Open in New York. Photo: AP
Rafael Nadal in action at the U.S. Open in New York. Photo: AP
Marat Safin waves to the crowd after his loss to Jurgen Melzer at the U.S. Open in New York. Photo: AP
Venus Williams returns to Bethanie Mattek-Sands at the U.S. Open in New York. Photo: AP
Timea Bacsinszky in action at the U.S. Open in New York. Photo: AP