The unresolved sovereignty dispute between Serbia and Kosovo, rooted in Kosovo's 2008 independence declaration, that has kept the western Balkans' most volatile territorial question open for nearly two decades.

卡拉斯未主持过任何高级别会议；特别代表索伦森因两国首都的不稳定而陷入僵局，与此同时欧盟解除了对科索沃的惩罚性措施