Ukrainian President Volodymyr Zelenskiy says he had "an open, honest, and fruitful meeting" in Athens with his Serbian counterpart, Aleksandar Vucic. "Good conversation on respect for the UN Charter and the inviolability of borders. On our nations’ shared future in the common European home. On developing our relations, that is in our mutual interest," he said in a post on the X social media platform, formerly known as Twitter. Greek Prime Minister Kyriakos Mitsotakis hosted an informal summit in the Greek capital for top officials from nine Balkan nations. Serbia, a traditional ally of Russia, has bucked EU pressure to join Western sanctions to punish Moscow for its full-scale invasion of Ukraine.