France's Jeremy Chardy returns the ball to Serbia's Novak Djokovic during their second round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. (AP Photo/David Vincent)
Serbia's Novak Djokovic returns the ball to France's Jeremy Chardy during their second round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. (AP Photo/David Vincent)
Serbia's Novak Djokovic returns the ball to France's Jeremy Chardy during their second round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. (AP Photo/David Vincent)