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PARIS, FRANCE June 4. French Open Tennis Tournament - Day Nine. Marin Cilic of Croatia in action against Fabio Fognini of Italy on Court Philippe-Chatrier in the Men's Singles Competition at the 2018 French Open Tennis Tournament at Roland Garros on June 4th 2018 in Paris, France. (Photo by Tim Clayton/Corbis via Getty Images)

PARIS, FRANCE June 4. French Open Tennis Tournament - Day Nine. Marin Cilic of Croatia in action against Fabio Fognini of Italy on Court Philippe-Chatrier in the Men's Singles Competition at the 2018 French Open Tennis Tournament at Roland Garros on June 4th 2018 in Paris, France.  (Photo by Tim Clayton/Corbis via Getty Images)