John Isner of the U.S. returns the ball during the first round match of the French Open tennis tournament against France's Pierre-Hugues Herbert at the Roland Garros stadium, in Paris, France, Sunday, May 25, 2014. (AP Photo/David Vincent)
John Isner of the U.S. clenches his fist during the first round match of the French Open tennis tournament against France's Pierre-Hugues Herbert at the Roland Garros stadium, in Paris, France, Sunday, May 25, 2014. (AP Photo/David Vincent)