Rolex Paris Masters 2018 Tennis Tournament - Day 4 [Getty Images]

PARIS, FRANCE - NOVEMBER 01: Novak Djokovic of Serbia in action against Damir Dzumhur (not seen) of Bosnia and Herzegovina during the Rolex Paris Masters tennis tournament at AccorHotels Arena in Paris, France on November 01, 2018. (Photo by Mustafa Yalcin/Anadolu Agency/Getty Images) — see more

PARIS, FRANCE - NOVEMBER 01: Novak Djokovic of Serbia in action against Damir Dzumhur (not seen) of Bosnia and Herzegovina during the Rolex Paris Masters tennis tournament at AccorHotels Arena in Paris, France on November 01, 2018. (Photo by Mustafa Yalcin/Anadolu Agency/Getty Images)

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