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

Zelenskyy said Tuesday that “if Putin does not arrive and plays games, it is the final point that he does not want to end the 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.