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DUBAI, UNITED ARAB EMIRATES - FEBRUARY 26: Alexander Bublik of Kazakhstan plays a forehand against Stefanos Tsitsipas of Greece during his men's singles match on Day Ten of the Dubai Duty Free Tennis at Dubai Duty Free Tennis Stadium on February 26, 2020 in Dubai, United Arab Emirates. (Photo by Francois Nel/Getty Images)

DUBAI, UNITED ARAB EMIRATES - FEBRUARY 26: Alexander Bublik of Kazakhstan plays a forehand against Stefanos Tsitsipas of Greece during his men's singles match on Day Ten of the Dubai Duty Free Tennis at Dubai Duty Free Tennis Stadium on February 26, 2020 in Dubai, United Arab Emirates. (Photo by Francois Nel/Getty Images)