Ryan Harrison Pictures

  • NEW YORK, NY - AUGUST 31: Ryan Harrison of the United States returns a shot against Juan Martin Del Potro of Argentina during their men's singles second round match on Day Five of the 2012 US Open at USTA Billie Jean King National Tennis Center on August 31, 2012 in the Flushing neigborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)