nbl1 is a semi-professional basketball league in australia, comprising a north conference and a south conference with both a men's and women's competitions. the league is run by basketball victoria and includes teams from victoria, new south wales, queensland, south australia, tasmania and the australian capital territory. the league replaced the south east australian basketball league (seabl), australia's pre-eminent semi-professional basketball league between 1981 and 2018. following the nbl1's inaugural season in 2019, the 2020 season saw the 2019 teams comprise the new south conference and the former queensland basketball league become the new north conference.