Tommy Haas Pictures
NEW YORK, NY - AUGUST 27: Tommy Haas of Germany serves to Paul-Henri Mathieu of France during their men's singles first round match on Day Two of the 2013 US Open at USTA Billie Jean King National Tennis Center on August 27, 2013 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)