Australian Open spectators were warned on Wednesday that they risk being ejected if they target nine-time champion Novak Djokovic.

 Nick Kyrgios took a cheeky dig at his critics after tickets for Friday's practice match with Serb Novak Djokovic sold out in 58 minutes, proving the Australian's huge box office draw.

Daniil Medvedev on Sunday admitted he would rather be playing at the mixed teams United Cup than the Adelaide International, but the Russian intends to make the most of the season-opening event.

Nick Kyrgios said he withdrew from the inaugural edition of the United Cup to be in peak condition for next month's Australian Open, adding that he did not expect everyone to understand the reasoning behind his decision.

Former world number one Novak Djokovic arrived in Australia on Tuesday almost one year after he was deported for refusing to be vaccinated against Covid-19, tennis officials said.

Rafael Nadal says it's time to step up at the Australian Open after fighting off tenacious Argentine Diego Schwartzman to win through to the quarter-finals.

Novak Djokovic of Serbia and former Australian cricketer Shane Warne took part in a game during a charity event in Melbourne.

The moment Novak Djokovic accepted that being part of the Roger Federer/Rafael Nadal era was a chance, not a curse, everything improved for him. After winning his first French Open title, world's number one tennis player holds all four grand slams at the same time.