Ukraine’s President Volodymyr Zelensky raised the stakes ahead of a potential meeting with Vladimir Putin in Turkey on Thursday by saying he wouldn’t hold talks with any Russian representative other than the president himself.

President Volodymyr Zelensky of Ukraine said that if President Trump attended the talks, it would put pressure Russia’s leader, Vladimir V. Putin, to meet face-to-face.

Zelenskyy told reporters in Kyiv that he will be in Ankara on Thursday to conduct the negotiations. He plans to meet with Turkish President Recep Tayyip Erdogan and the two will wait for Putin to arrive, he said. Zelenskyy said that if Putin chooses Istanbul to hold the meeting, then both leaders will travel there.