Switzerland's Stanislas Wawrinka reacts as he plays Spain's Guillermo Garcia-Lopez during their first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. (AP Photo/Michel Euler)
Spain's Rafael Nadal returns the ball during the first round match of the French Open tennis tournament against Robby Ginepri of the U.S. at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. (AP Photo/Michel Euler)
Spain's Rafael Nadal returns the ball during the first round match of the French Open tennis tournament against Robby Ginepri of the U.S. at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. (AP Photo/Michel Spingler)
Spain's Rafael Nadal adjusts his head band during a break in the first round match of the French Open tennis tournament against Robby Ginepri of the U.S. at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. (AP Photo/Michel Spingler)