Former world No. 1 Andy Roddick has expressed concern that serious injuries may be a recurring problem for 24-time Grand Slam champion Novak Djokovic.

The 24-time Grand Slam champion Novak Djokovic has opted out of Serbia’s Davis Cup team after sustaining a muscular injury in his left thigh during the Australian Open.

Novak Djokovic simply cannot shake the conspiracy allegations that surrounded him at the Australian Open. The 10-time Australian Open champion went to extreme lengths this week to share photographs of a hamstring strain on his Instagram account after his unexpected withdrawal from the tournament raised concerns.

Novak Djokovic’s remarkable story at the Australian Open may have had the most unfortunate conclusion as he limped out of the tournament in his semi-final against Alexander Zverev last week – but his legacy looks set to be secured for eternity.

It's been revealed just how long Novak Djokovic could be sidelined for after suffering an injury at the Australian Open

Andy Murray has told tennis coaches that it's far harder playing the sport than watching on from the sidelines after working with Novak Djokovic at the Australian Open. Djokovic made the semi-finals of the competition this winter but was forced to withdraw from his showdown with Alexander Zverev on Friday due to injury.