The Australian Open is currently being played, and Russian and Belarusian players are participating under a neutral flag. Despite this, Olijnykova believes they should not be allowed to participate.
"I think it's very wrong that they're not disqualified in tennis like in other sports," she told The Age newspaper.
Olijnykova, who is ranked 92nd in the world, lost in the first round of the tournament to last year's winner Madison Keys. Olijnykova's father serves in the Ukrainian military.
Sabalenka, who is Belarusian, has previously said that she doesn't think sports have anything to do with politics.
