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.

Novak Djokovic posted a scan of his injured left hamstring on social media Sunday, while taking a shot at fans that booed him for retiring during his semifinal match against Alexander Zverev.

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