Rafael Nadal's former coach says there's been “mistrust” surrounding the injured Djokovic’s physical condition long before fans lashed out in Melbourne.

Shortly after Sinner defeated Zverev to win his third Grand Slam singles title, the two starts flew back to Europe together from Melbourne.

"I can't even put into words how happy I am for her," gushed Townsend about her good friend after her own Melbourne crowning moment.

"It’s your last Australian Open as a coach, and I’m very, very happy to share this trophy with you," the Italian said.

The new queen of Melbourne Park was styled in a mineral blue mini dress for the occasion.