BRISBANE, Australia — With his medical exemption approved, Novak Djokovic may have some explaining to do when he gets to Melbourne to defend his Australian Open title.

The exemption allows the top-ranked Djokovic entry to the tournament regardless of his vaccination status for COVID-19, a subject he has declined to clarify amid months of speculation that he could miss the season-opening major unless he can prove he’s had two doses of a coronavirus vaccine.

That’s a Victoria state government-mandated condition of entry for all players, staff, fans and officials entering Melbourne Park when the tournament starts on Jan. 17.

His revelation on social media that he was heading to Australia seeking a record 21st major title sparked some debate and plenty of headlines on Wednesday, with critics questioning what grounds Djokovic could have for the exemption and backers defending his right to privacy.

Australian Open tournament director Craig Tiley defended the “completely legitimate application and process” and insisted there was no special treatment for Djokovic.

Only 26 people connected with the tennis Grand Slam event applied for an exemption and, Tiley said, only a “handful” — estimated at about five — were granted.

The names, ages and nationalities of applicants were redacted for privacy reasons before each application for a vaccine exemption was assessed by two independent panels of experts, and Tiley noted Djokovic is under no obligation to reveal his reason for seeking one.

But, he suggested, it would be “helpful” if Djokovic chose to explain it to a Melbourne public still getting over months of lockdowns and severe travel restrictions imposed at the height of the pandemic.

“I would encourage him to talk to the community about it,” Tiley said. “We have been through a very tough period over the last two years.”

Some reasons allowed for anyone applying for a vaccination exemption can include an acute major medical condition, serious adverse reaction to a previous dose of a COVID-19 vaccine, or evidence of a COVID-19 infection within the previous six months.

Jaala Pulford, Victoria state’s acting minister for sports, said “no one is or will be receiving special treatment because of who they are or what they have achieved professionally.”

“Lots of people in the Victorian community will find this to be a disappointing outcome, but the process is the process,” Pulford said. “Nobody has had special treatment. The process is incredibly robust.”

There was confusion late Wednesday, with Djokovic in transit, over his visa status to enter the country.

Australian Prime Minister Scott Morrison initially said the decision was a matter for the government of Victoria, where Melbourne is the state capital.

“They have provided [Djokovic] with an exemption to come to Australia, and so we then act in accordance with that,” Morrison said. “States provide exemptions for people to enter on those basis, and that’s been happening for the last two years.”

Home affairs minister Karen Andrews clarified in a statement that the Australian Border Force would make the final determination.

“While the Victorian government and Tennis Australia may permit a non-vaccinated player to compete in the Australian Open, it is the Commonwealth government that will enforce our requirements at the Australian border,” Andrews said. “If an arriving individual is not vaccinated, they must provide acceptable proof that they cannot be vaccinated for medical reasons to be able to access the same travel arrangement as fully vaccinated travelers.”

Morrison later added, when asked about Djokovic, that “If that evidence is insufficient, then he won’t be treated any different to anyone else and he’ll be on the next plane home.”

“And so if medical exemptions had been provided by medical professionals and that’s been furnished to him as a proviso for him to get on that plane, well, that will have to stack up when he arrives in Australia.”

Morrison said there have been numerous cases in recent years where people have had to provide suitable proof to support their claims for a medical exemption, “so the circumstance is not unique.”

Later still, Pulford, the Victoria state politician, tweeted to say “the federal government has asked if we will support Novak Djokovic’s application to enter Australia.”

She said the state would not be providing individual application support, adding in a second post: “We’ve always been clear on two points: visa approvals are a matter for the Federal Government, and medical exemptions are a matter for doctors.”

Djokovic tested positive for the coronavirus in 2020 after he played in a series of exhibition matches that he organized in Serbia and Croatia without social distancing amid the pandemic.

It’s not inconceivable that Djokovic, 34, who finished one win short of a calendar-year Grand Slam in 2021 when he lost the US Open final to Daniil Medvedev, could have been infected again.