Some critics questioned the legitimacy of his injury that led to his medical retirement from the Australian Open semifinal.

Novak Djokovic rounded on his critics on Saturday the day after retiring injured in his Australian Open semi-final after the first set against Alexander Zverev to boos from the crowd at the tournament he has won 10 times.

Novak Djokovic has posted a scan of his injured left hamstring on social media more than 24 hours after being booed at the Australian Open when he quit playing one set into his semifinal because of what he said was a torn muscle.