Roger Federer of Switzerland wipes his face with a towel during his men's singles match against Dmitry...
Roger Federer of Switzerland wipes his face with a towel during his men's singles match against Dmitry Tursunov of Russia at the French Open tennis tournament at the Roland Garros stadium in Paris May 30, 2014. REUTERS/Gonzalo Fuentes (FRANCE - Tags: SPORT TENNIS)