PARIS, FRANCE - MAY 30: Kei Nishikori of Japan during Day Four of the 2018 French Open at Roland Garros on May 30, 2018 in Paris, France. (Photo by Jean Catuffe/Getty Images)
PARIS, FRANCE - MAY 30: Kei Nishikori of Japan during Day Four of the 2018 French Open at Roland Garros on May 30, 2018 in Paris, France. (Photo by Jean Catuffe/Getty Images)