World No. 2 Aryna Sabalenka of Belarus refused to comment on the war in Ukraine and her country's involvement as a staging post for Russian troops, when asked specifically to condemn it on Wednesday.

The 25-year-old was urged by Ukraine's Marta Kostyuk, her opponent in the first round of the French Open on Sunday, to take a personal stand on the war.

"I have no comments to you, so thank you for your question," she told a news conference before a reporter asked about her relationship with Belarus president Alexander Lukashenko and whether a potential world No. 1 should be associated with him. Sabalenka has met Lukashenko in the past.

Lukashenko, Russian president Vladimir Putin's staunchest ally among the nation's neighbors, celebrated Sabalenka's Australian Open victory in January and said recently that people knew which country she hailed from even if she was playing under a neutral flag.

"I've got no comments to you," she said. "You've got enough answers from me, and I've got no comments to you."

Sabalenka said on Sunday that no Russian or Belarusian athlete supported the war.

In March 2022, tennis' governing bodies barred players from Russia and Belarus from competing under the name or flag of either country due to the war, requiring them to play under neutral flags.

Sabalenka will take over the No.1 spot from Iga Swiatek of Poland if she wins the Grand Slam tournament in Paris.

Kostyuk had refused to shake Sabalenka's hand after losing 6-3, 6-2 on Sunday and urged her to take a stronger, more personal stand against the war.

"She (Sabalenka) never says that she personally doesn't support this war, and I feel like journalists should change the questions you ask these athletes because the war is already there," Kostyuk said.