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