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DUBAI, UNITED ARAB EMIRATES - MARCH 02: Lucas Pouille of France plays a backhand during his semi final match against Filip Krajinovic of Serbia on day five of the ATP Dubai Duty Free Tennis Championships at the Dubai Duty Free Stadium on March 2, 2018 in Dubai, United Arab Emirates (Photo by Tom Dulat/Getty Images)

DUBAI, UNITED ARAB EMIRATES - MARCH 02:  Lucas Pouille of France plays a backhand during his semi final match against Filip Krajinovic of Serbia on day five of the ATP Dubai Duty Free Tennis Championships at the Dubai Duty Free Stadium on March 2, 2018 in Dubai, United Arab Emirates  (Photo by Tom Dulat/Getty Images)