Juan Martin del Potro of Argentina walks off the court after losing his semi-final match against Roger Federer of Switzerland at the French Open tennis tournament at Roland Garros in Paris June 5, 2009.(Xinhua)
Juan Martin del Potro of Argentina walks off the court after losing his semi-final match against Roger Federer of Switzerland at the French Open tennis tournament at Roland Garros in Paris June 5, 2009.(Xinhua)