Western & Southern Open - Day 8 [Getty Images]

MASON, OH - AUGUST 20: Karolina Pliskova of the Czech Republic hits a return in the semifinal match against Garbiñe Muguruza during day 8 of the Western & Southern Open at the Lindner Family Tennis Center on August 20, 2016 in Mason, Ohio. (Photo by Andy Lyons/Getty Images)

Getty Images Sport Andy Lyons