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.

Ukraine and Russia are expected to hold their first direct peace talks since the weeks following Moscow’s full-scale invasion three years ago, but little is known aside from the date and the place: May 15 in Istanbul.

Zelenskyy told reporters in Kyiv 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 if Putin chooses Istanbul to hold the meeting, then both leaders will travel there.