NOVAK DJOKOVIC said today he is “pleased and grateful” that his appeal against a decision to refuse him a visa in the Federal Circuit Court of Australia was successful and he wants to “stay and try to compete” at the Australian Open.

Judge Anthony Kelly quashed the visa cancellation and ordered the Australian government to pay legal costs and release the Serb from detention within half an hour.

But Minister for Immigration Alex Hawke is still considering whether to exercise a personal power of cancellation of Djokovic’s visa in a process that could drag on for a number of days.

The world number one tweeted: “I’m pleased and grateful that the judge overturned my visa cancellation. Despite all that has happened, I want to stay and try to compete @AustralianOpen.

“I remain focused on that. I flew here to play at one of the most important events we have in front of the amazing fans.

“For now I cannot say more but THANK YOU all for standing with me through all this and encouraging me to stay strong.”

At a press conference staged by the Djokovic family in Belgrade, his mother Dijana described her son’s successful appeal as “the biggest win of his career – bigger than any of the grand slams he has won.”

She added: “He has done nothing wrong. He hasn’t broken any of their laws, but he was subjected to torture, to harassment.

“He fought against that system and against that government because he thought had the right to be there with the visa that he got, and he went there to win that tournament.”

However, Djokovic’s plans could still be scuppered if Hawke exercises his right to overrule the court’s decision.

A spokesman for Hawke, in a statement released to AAP, said: “Following today’s Federal Circuit and Family Court determination on a procedural ground, it remains within Immigration Minister Hawke’s discretion to consider cancelling Mr Djokovic’s visa under his personal power of cancellation within section 133C(3) of the Migration Act.

“The minister is currently considering the matter.”

It was reported Hawke may have only a four-hour window in which to consider cancellation of Djokovic’s visa, but the rule did not apply in this case because the 34-year-old had not been re-interviewed.

Amid continued confusion over Djokovic’s fate, Serbian supporters clashed with police outside the court building and Goran Djokovic, the player’s uncle, accused the authorities of treating the reigning Australian Open champion like “an animal” in an interview with GB News.

Earlier, Djokovic was removed from detention to be with his lawyers during the hearing, and Judge Anthony Kelly expressed agitation over the rejection of Djokovic’s medical exemption.

After Djokovic’s lawyers argued their case, Judge Kelly asked the court “What more could this man have done?” in relation to fulfilling the expected requirements for a medical exemption.

The minutes of the court transcript also noted that Djokovic had not been given adequate time to respond to the notification to cancel his visa.

“Here, a professor and an eminently qualified physician have produced and provided to the applicant a medical exemption,” Judge Kelly said.

“Further to that, that medical exemption and the basis on which it was given was separately given by a further independent expert specialist panel established by the Victorian state government and that document was in the hands of the delegate.”

At a press conference, Australia’s Prime Minister Scott Morrison was asked by a reporter to respond to comments from Tennis Australia chief executive Craig Tiley stating he was given conflicting government advice on medical exemptions.

Morrison said: “Well, the matter is before the court so I can’t comment on the matter before the court … but in relation to the government, our government, the federal government’s advice to Tennis Australia, that was set out very clearly in November, as I read the extract from this very podium, it could not be more clear.”