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PARIS, FRANCE - MAY 29: Kei Nishikori of Japan acknowledges the fans after his second round victory against Jo-Wilfried Tsonga of France during day 4 of the 2019 French Open at Roland Garros stadium on May 29, 2019 in Paris, France. (Photo by Jean Catuffe/Getty Images)

PARIS, FRANCE - MAY 29: Kei Nishikori of Japan acknowledges the fans after his second round victory against Jo-Wilfried Tsonga of France during day 4 of the 2019 French Open at Roland Garros stadium on May 29, 2019 in Paris, France. (Photo by Jean Catuffe/Getty Images)