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PARIS, FRANCE - MAY 22: Jack Sock of the United States plays a forehand during the Mens Singles first round match against Robin Haase of Netherlands on day one of the 2016 French Open at Roland Garros on May 22, 2016 in Paris, France. (Photo by Dennis Grombkowski/Getty Images)

PARIS, FRANCE - MAY 22:  Jack Sock of the United States plays a forehand during the Mens Singles first round match against Robin Haase of Netherlands on day one of the 2016 French Open at Roland Garros on May 22, 2016 in Paris, France.  (Photo by Dennis Grombkowski/Getty Images)