Highest-tier professional men's club basketball competition in Europe
The EuroLeague, officially the Turkish Airlines EuroLeague, is a European men's professional basketball club competition. The league is widely recognised as the top-tier men's league in Europe. The league consists of 18 teams, of which 16 are given long-term licences and wild cards, making the league a semi-closed league. The league was first organized by FIBA in 1958, subsequently by ULEB in 2000 and then solely the Euroleague Basketball.
https://en.wikipedia.org/wiki/EuroLeague