The Ukrainian delegation's positions before the fourth round of negotiations with Russian representatives on Monday remain unchanged, and Kyiv will demand above all a ceasefire and the withdrawal of all Russian forces from Ukrainian territory, Mykhailo Podoliak, advisor to the Ukrainian presidential office chief, said on Monday.

"The fourth round of negotiations with the Russian delegation is to begin literally within a few minutes. We will finally try to prove to them that the 19th day of the war is the 19th day of the great feat of Ukraine," Podoliak said in a video address.

"Our positions are unchanged: peace, an immediate ceasefire, and the withdrawal of all Russian troops. Only then will we be able to talk about any neighborly relations and political settlements," Podoliak said.

The adviser to the head of the President's Office also said that Ukraine would definitely win. "You cannot even doubt it," Podoliak said.