First Regional Basketball League (Serbia)
First Men's Regional League (), previously First Serbian League, is the men's regional basketball league in Serbia. It is the 3rd-tier of the basketball league system in Serbia. It was founded in 2006. Rules. Competition format. The league, operated by the Basketball Federation of Serbia and regional basketball associations, consists of four divisions, North, Central, East and West, which have 14 teams each. The first team in every division will be promoted to the Second Basketball League of Serbia. The teams positioned 13th and 14th in the First Regional League will be relegated  to a lower-tier league - the Second Regional League. History. Division champions of the First Regional League: Current clubs. The following is the list of clubs for the 2021–22 season. North. The North division is composed of 16 clubs. Center. The Center division is composed of 15 clubs. East. The East division is composed of 16 teams. West. The West division is composed of 16 teams.