Ukrainian President Volodymyr Zelensky's visit to Serbia, the first by a Ukrainian head of state since 2018, has highlighted a potentially new phase in relations between Kyiv and Belgrade, while also exposing the difficult balancing act of Serbian President Aleksandar Vucic. For Kyiv, closer ties with Serbia could provide diplomatic and practical benefits, particularly because Serbia is one of the few European countries that has not joined Western sanctions against Russia.

BELGRADE/KYIV — Ukrainian President Volodymyr Zelensky met with Serbian President Aleksandar Vucic in Belgrade on Saturday, marking the first visit by a Ukrainian president to…

Ukrainian President Volodymyr Zelenskyy arrived in Serbia on Friday for his first official visit to the country, as Belgrade seeks to...