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.

Ukrainian President Volodymyr Zelenskyy says that he will be waiting for Russian President Vladimir Putin in the Turkish capital this week to conduct face-to-face talks about the more than three-year war.

The new round of negotiations comes amid a long history of delaying tactics by the Russian side as the fighting in Ukraine grinds on.