ATP Dubai Duty Free Tennis Championship - Day Four [Getty Images]

DUBAI, UNITED ARAB EMIRATES - MARCH 01: Philipp Kohlschreiber of Germany serves during his second round match against Daniil Medvedev of Russia on day four of the ATP Dubai Duty Free Tennis Championship on March 1, 2017 in Dubai, United Arab Emirates. (Photo by Tom Dulat/Getty Images)

Getty Images Sport Tom Dulat