Tim Henman believes Novak Djokovic can elevate himself above the rest and become the undisputed GOAT if he completes the Calendar Slam.
Djokovic is locked alongside Roger Federer and Rafael Nadal on 20 career Grand Slam titles, with debate continuing to rage among fans over which is the greatest of all time.
Neither Federer nor Nadal will compete at the upcoming US Open, meaning Djokovic has the chance to go past them onto 21.
Should he do that, he would also complete a rare Calendar Slam by winning all four of the year's majors.
And, should that happen, former world number four Henman believes the debates must stop.
“There are two different conversations to be had about the greatest player, the best player, that comes down to a numbers game and Djokovic will win that.” Henman told Tennis365.
"Federer is the most popular player that has ever played our sport."
“But you have to say if Novak goes to 21 and Federer and [Rafael] Nadal are on 20, you would have to say Djokovic is leading that debate over who is the greatest, but throw in a Calendar Grand Slam and it would elevate him to a different level. He would then be the best male player of all time.”
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