Daniel Koellerer Pictures

  • NEW YORK - SEPTEMBER 06: Daniel Koellerer of Austria reacts to a play during his match against Juan Martin Del Potro of Argentina during day seven of the 2009 U.S. Open at the USTA Billie Jean King National Tennis Center on September 6, 2009 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)