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PARIS, FRANCE - MAY 30: Kei Nishikori of Japan plays a forehand during the mens singles first round match against Thanasi Kokkinakis of Australia on day three of the 2017 French Open at Roland Garros on May 30, 2017 in Paris, France. (Photo by Julian Finney/Getty Images)

PARIS, FRANCE - MAY 30:  Kei Nishikori of Japan plays a forehand during the mens singles first round match against Thanasi Kokkinakis of Australia on day three of the 2017 French Open at Roland Garros on May 30, 2017 in Paris, France.  (Photo by Julian Finney/Getty Images)