WTA Dubai Duty Free Tennis Championship - Day Three [Getty Images]

DUBAI, UNITED ARAB EMIRATES - FEBRUARY 17: Andrea Petkovic of Germany in action in her match against Zarina Diyas of Kazakhstan during day three of the WTA Dubai Duty Free Tennis Championship at the Dubai Duty Free Stadium on February 17, 2015 in Dubai, United Arab Emirates. (Photo by Francois Nel/Getty Images)

Getty Images Sport Francois Nel