Toni Nadal, Rafael Nadal's uncle and once coach, questioned the legitimacy of Novak Djokovic's hamstring injury that led to his withdrawal from the Australian Open semi-final. He suggests Djokovic should have taken a medical time out before quitting and references Djokovic's history of playing through injuries with apparent normality despite showing pain.

Facing Sinner reminded Alexander Zverev of trying to solve the challenge presented by the 24-time major champion Djokovic.

Serbian Davis Cup captain Viktor Troicki has demanded Channel Nine commentator Tony Jones be banned from covering tennis for life following controversial comments about Novak Djokovic at the Australian Open.