The Federal Court on Saturday released an online file outlining the details of the world No.1's battle to remain in the country to contest the Australian Open after his visa was revoked on arrival.

The documents show that Tennis Australia's chief medical officer on December 30 had granted Djokovic a "medical exemption from COVID vaccination" because he had recently recovered from a positive COVID-19 test on December 16.

"During an interview with an Australian Border Force officer, you have stated you are not vaccinated against COVID-19," a partial transcript of an interview in the document read.

The matter is due back in court on Monday and Nick Kyrgios has warned that a fired-up Djokovic will be out to "stick it to everyone" if the nine-time champion is able to overturn the deportation order and play in the Australian Open.

As Djokovic broke his silence from his Melbourne detention hotel after having his visa revoked, posting a message of thanks to his supporters, Kyrgios described the situation as a "mess".

Kyrgios doubled down on his Friday call for Australian authorities to "do better" than the humiliating treatment of Djokovic.

He felt it wasn't "humane" and the Serbian had been singled out due to his superstar status.

"I'm feeling for him now, it's not really humane what's going on ... I want it to end," Krygios said at a Sydney Tennis International press conference.

But Kyrgios doesn't think the world No.1's detention in a small hotel room will dent his hopes of landing a record 21st grand slam title in Melbourne.

He hopes not to meet him early in the draw.

"If he's allowed to play the Australian Open, I don't want any bar of him," Kyrgios said.

"I reckon he's going to be pissed off - he's going to be very determined to play well and stick it to everyone with what's going on.

"I think he'll have no problem preparing and this is just all added fuel for him.

"We all know how good of a competitor he is - you don't become a great champion like that without being able to overcome some adversity like this and I'm sure he's overcome a lot more challenging times than spending a couple more extra days in a hotel room."

The pair have a chequered history but Kyrgios, who has dropped to world No.93, revealed they used to be friends who practised together before tournaments.

He said Djokovic had also been generous with his money and time when he was trying to raise money for the bushfire appeal in 2020.

Djokovic has given nothing away about the conditions he's facing in the hotel, which also houses about 30 refugees, but took to Instagram for the first time since he arrived in Australia.

"Thank you to people around the world for your continuous support. I can feel it and it is greatly appreciated," Djokovic posted.

Some supporters were still maintaining their vigil outside the hotel while Djokovic has received calls from his parents in Serbia as well as the country's president.

In Belgrade, there was another major demonstration of support for the national Serbian hero's plight which Djokovic's father Srdjan attended.

"They hate him because Australian politicians have put pressure on people to hate him because he thinks with his own brain," Djokovic senior told the rally.

"He (Djokovic) is in prison, not in custody, not in a hotel."

With AP

Australian Associated Press