Is Novak Djokovic the greatest tennis player of all time? If you look at his accomplishments, the answer should be obvious and yet it still seems to be up for debate.

Tennis superstar Novak Djokovic joins GQ to reveal his 10 Essentials. The Serbian tennis player breaks down his daily essentials: from his Head tennis racket (“I string it quite tight compared to most of the other guys”) to his healing disc (“it creates an electromagnetic field around it”).

Andy Murray insists that he will be only too happy to face the wrath of Novak Djokovic, should he find himself on the receiving end of a few mouthy outbursts at next week’s Australian Open.