Western & Southern Open - Day 8 [Getty Images]

CINCINNATI, OH - AUGUST 16: Ana Ivanovic of Serbia bites her racket after a missed shot during her match against Maria Sharapova of Russia on day 8 of the Western & Southern Open on August 16, 2014 at the Linder Family Tennis Center in Cincinnati, Ohio. (Photo by Andy Lyons/Getty Images)

Getty Images Sport Andy Lyons