2015 French Open - Day Seven [Getty Images]

PARIS, FRANCE - MAY 30: Novak Djokovic of Serbia returns a shot in his Men's Singles match against Thanasi Kokkinakis of Australia on day seven of the 2015 French Open at Roland Garros on May 30, 2015 in Paris, France. (Photo by Clive Mason/Getty Images)

Getty Images Sport Clive Mason