Djokovic's next moves have been unclear since he flew out of Melbourne and home to Belgrade, via Dubai, as the tournament he has won a record nine times got under way in Melbourne.
The pandemic has proved damaging for the all-time tennis great, who organised a super-spreader tournament series in 2020 and was pictured maskless at an awards ceremony a day after he tested positive in December.
He was first handed an exemption to play by Tennis Australia despite his unvaccinated status, but Australian authorities revoked his visa in a decision that was ultimately upheld by the Federal Court.
Djokovic, who shares the record of 20 major titles with Rafael Nadal and Roger Federer, now faces diminishing possibilities to add to his haul with France, host of Roland Garros, barring unvaccinated sportspeople and New York, home of the US Open, also under stringent virus rules.
Coronavirus vaccination is not a requirement to enter the United Arab Emirates, where 100 per cent of residents have had at least one jab.