20-24. His agenda includes bilateral talks with world leaders and meetings with top business officials. The meeting with Vucic centered on security guarantees and the two countries' path to membership in the European Union, the Presidential Office said. Vucic has previously called Ukraine a "friendly country" and affirmed that Crimea and Donbas are sovereign Ukrainian territories, despite Serbia's historically warm relationship with Russia. During the meeting, Zelensky stressed to Vucic that "sustainable peace must be supported by strong security guarantees." The leaders' meeting comes a week after Vucic offered to host a potential meeting between U.S. President Donald Trump and Russian President Vladimir Putin in Belgrade. Zelensky's meeting with Milei touched on matters of economic cooperation, recent global events, and cooperation with the U.S.