Novak Djokovic is named as a competitor in the Australian Open after weeks of uncertainty.

The No. 1-ranked tennis player Novak Djokovic was named as a participant in the Australian Open in January by the tournament’s organizers on Wednesday. But Djokovic previously said he might not attend the Open because he was unwilling to reveal his vaccination status.

The Grand Slam tournament included Djokovic in its main draw entry list for the summer tournament. “Defending champion Djokovic will play for an incredible 10th Australian Open trophy — and a men’s record 21st major singles title — and will be the favorite in a draw which showcases 49 of the world’s top 50,” the statement said.

But Craig Tiley, chief executive of Tennis Australia, which hosts the Australian Open, acknowledged on Thursday the “confusion” surrounding the announcement. He said in a local television interview: “What was published yesterday was a general entry list. And, as a matter of course, everyone goes on the entry list. It’s not a commitment list about who’s exactly in the draw. That comes in several weeks time, when the actual list, and draw, gets finalized for the Australian Open.”

The announcement on Wednesday followed one made a day earlier by the ATP Cup tournament, which will be held in Sydney as a precursor to the Australian Open. The ATP Cup listed Djokovic among its attendees. Djokovic, the reigning champion and a nine-time winner of the Australian Open, could not immediately be reached for comment.

Australia has placed a temporary two-week ban on international arrivals because of the Omicron variant. Before that, the government announced that some categories of visa holders would be allowed to freely enter the country if they were vaccinated. Officials placed caps on the number of unvaccinated travelers who could enter the country per week, and they were required to quarantine for two weeks upon arrival.

The Australian authorities have said that any players participating in tournaments in the country must be vaccinated. And in his interview, Mr. Tiley reiterated, “No one can play the Australian Open unless they’re vaccinated.”

In October, Djokovic told a Serbian news outlet that he might not attend the Australian Open. His remarks set off rounds of contradictory statements between Australian government ministers and tournament organizers about entry requirements for international visitors.

The local news media reported on speculation that Tennis Australia would seek medical exemptions for unvaccinated players. The organization denied those claims.

James Merlino, the deputy premier of Victoria state, of which Melbourne is the capital, said in response to the rumors, “Medical exemptions are just that — it’s not a loophole for privileged tennis players.”