The Serbian, who has not been vaccinated, was deported from Australia on Sunday ahead of the Australian Open after losing a court case to have the cancellation of his visa overturned.
"At least it's clear what's going to happen," he told reporters after winning his opening match at Melbourne Park on Monday.
"At least they're saying, 'OK, no unvaccinated players are allowed to play in the French Open.'.
"We know that now in advance, and I can imagine there's not going to be any exemptions, and that's OK.".
The next tournament on Djokovic's calendar is likely to be the Dubai Duty Free Tennis Championships from Feb. 21-26.
A U.S. Open representative said last week that the year's final major would follow New York City Department of Health guidelines.
Spain requires visitors to prove they have been vaccinated, had a recent negative test, or have immunity based on recovery. »