Anastasia Pavlyuchenkova has tested positive for Covid after arriving in Australia on Tuesday.
Pavlyuchenkova, 30, said she was isolating and confirmed she was fully vaccinated.
“I was fully vaccinated and was preparing for the start of the season in Dubai,” Pavlyuchenkova said on social media.
“But we live in a very difficult and unpredictable time. Right now I am in complete isolation, in a special hotel and following all the protocols under the supervision of doctors.
“Now it’s important to take care of yourself and the health of others. I’ll be back on court when it’s safe for everyone.”