Novak Djokovic did his first training session on site in Australia on Tuesday after a couple of bureaucratically hectic days.
On Monday, the court in the state of Victoria revoked the cancellation of his visa.
But there are still a lot of question marks before the world set's participation in this year's first grand slam, which begins on January 17, can be secured.
The Australian government can still expel him and a statement on the matter is expected to come on Wednesday.
It's all about is that the 34-year-old is in the country on medical exemption, because he is unvaccinated against covid-19.
To enter the country, which has strict entry rules, it is usually required that you are double-vaccinated.
Dribbled with PCR tested?
The rules that the Australian Open organizer and the state of Victoria adhere to mean that exemptions can be given to people who have tested positive at some point in the last six months - which the tennis star received.
Weltsettan's lawyers have stated that their client tested positive for the coronavirus on December 16 and then again negatively seven days later.
But an examination of the initiated German news magazine Der Spiegel shows that the Serb may have dribbled with his test results and if it turns out to be true, he can still be expelled from the country.
Because according to the newspaper, the dates around the positive results are not correct.
It rather originates from December 26 - and not December 16 as first stated.
The documentation from the Institute of Public Health of Serbia states, all according to Der Spiegel, that the PCR test was performed at 13.05 on 16 December.
But in the digital version of the test result, there is a time stamp at 14.21, Serbian time, the 26th.
The negative result, on the other hand, is consistent both in the documentation and in the digital version.
In the Serbian test system, each sample is assigned an ID number.
According to the ID numbers entered in the database, the results indicate that the negative test was performed before the positive one.
May impose civil penalties
Whether this means that Novak Djokovic manipulated his PCR test is a question that still cannot be answered.
But the fact is that on December 26, the deadline for applying for entry into Australia, in time for the tournament, had passed.
But it does not stop there.
The Serb is also suspected of having provided false information when he filled in his health declaration, before his departure, on 1 January.
The tennis star stated there that he did not travel anywhere 14 days before arriving in Australia.
Traces he left on social media show pictures of Djokovic in Belgrade from December 25 and from Spanish Marbella on January 4.
Australia's border police are currently investigating that information.
Providing false information can lead to civil penalties.