Many tennis commentators say Novak Djokovic is all but unbeatable in Australia. He is, after all, the winner of a remarkable nine Australian Open Grand Slam titles. And, as the Australian government discovered this week, it hasn't proven easy to defeat him in a court of law, either.
source https://www.cnn.com/2022/01/12/opinions/novak-djokovic-covid-19-confusion-australian-open-saga-soutphommasane-stears/index.html