The Internazionali BNL d'Italia 2016 - Day Seven [Getty Images]

ROME, ITALY - MAY 14: Novak Djokovic of Serbia receives treatment to his left foot during his match against Kei Nishikori of Japan during day seven of The Internazionali BNL d'Italia 2016 on May 14, 2016 in Rome, Italy. (Photo by Matthew Lewis/Getty Images)

Getty Images Sport Matthew Lewis