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DUBAI, UNITED ARAB EMIRATES - FEBRUARY 28: Lukas Rosol of Czech Republic returns a shot during his match against Tomas Berdych of Czech Republic on day three of the ATP Dubai Duty Free Tennis Championship on February 28, 2017 in Dubai, United Arab Emirates. (Photo by Tom Dulat/Getty Images)

DUBAI, UNITED ARAB EMIRATES - FEBRUARY 28: Lukas Rosol of Czech Republic returns a shot during his match against Tomas Berdych of Czech Republic on day three of the ATP Dubai Duty Free Tennis Championship on February 28, 2017 in Dubai, United Arab Emirates.  (Photo by Tom Dulat/Getty Images)