Alexis Tsipras will travel to Belgrade on December 8-9, only hours after the the Turkish Prime Minister Recep Tayyip Erdogan will have concluded his visit to Athens, to participate in the 2nd Quadrilateral Summit between Greece, Bulgaria, Romania and Serbia.

"Our common future in the Balkans cannot be built on nationalism, as has unfortunately happened in the past, or on third party plans for our region; it can be built on the great potential of our peoples, respect for international law and a common European vision for our region," Prime Minister Alexis Tsipras said in his joint statements with Bulgaria's Prime Minister Boyko Borissov, Romania's Prime Minister Mihai Tudose and Serbian President Aleksandar Vucic, after the conclusion of the first Quadrilateral Summit Greece-Bulgaria-Romania-Serbia, held in Varna.