Unvaccinated players will not be allowed to compete at the 2022 Australian Open, says tournament director Craig Tiley.
Defending men's champion Novak Djokovic has said he does not want to publicly reveal his vaccination status.
"Novak knows he will have to be vaccinated to play," Tiley said.
"We would love to have him here."
Tiley also confirmed that the tournament, which runs from 17-30 January in Melbourne, would be played in front of capacity crowds.
A significant number of tennis players remain unvaccinated. In late October, 35% of those on the men's ATP Tour were unvaccinated.