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.

Trump had previously left open the possibility of attending the talks himself, despite the logistical challenges his visit would present.

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.