Djokovic detained again in Australia, declared public threat

Having once failed to remove the unvaccinated 34-year-old from the country, Australia's conservative government is trying again.

And Djokovic is fighting back for the second time, with a new court appeal scheduled for Sunday.

The case will be heard from 9:30 am (2230GMT) by the full Federal Court of three justices, a format that leaves little room to appeal any decision.

For now, the Serbian ace is back at a notorious Melbourne immigration detention facility after a few short-lived days of freedom following his first successful court appeal.

A motorcade was spotted moving from his lawyers' offices -- where he had been kept under guard for most of Saturday -- to the former Park Hotel facility.

For millions around the world, the Serbian star is best known as a gangly all-conquering tennis champion with a ferocious backhand and his anti-vaccine stance.

In court filings, Australia has cast him as a figurehead for anti-vaxxers and a catalyst for potential "civil unrest" who must be removed in the public interest.

Djokovic's presence in Australia "may foster anti-vaccination sentiment", immigration minister Alex Hawke argued, justifying his use of broad executive powers to revoke the ace's visa.

Not only could Djokovic encourage people to flout health rules, Hawke said, but his presence could lead to "civil unrest".

So with just two days before the Australian Open begins, the defending champion is again focused on law courts rather than centre court.