Andre Agassi may be considered one of the finest ever to have graced the tennis courts, but it seems his protege, Novak Djokovic, has found a flaw that went unseen all these years. 

Djokovic uploaded a picture on his Instagram profile of himself and the 47-year-old Agassi stretching, with a typically tongue-in-cheek caption: “Flexibility test Andre promised that he'll touch the floor by the end of Wimbledon #goals #teamdjokovic.”

Currently ranked fourth in the world, Djokovic has been working with Agassi since this year's French Open as he hopes the eight-time Grand Slam winner’s wealth of experience rubs off on him in a bid to revitalise his flagging career. 

At 30, Djokovic still has plenty of tennis left in him but after a disastrous 12-month period following his 2016 French Open triumph, in which he failed to lift a single major, many critics seem to have written off the Serbian’s chances of winning a 13th Slam.

Currently, Djokovic has been easing past opponents at the ongoing Wimbledon Championships and next faces Latvian Ernests Gulbis in the third-round.