Anadolu Efes Spor Kulübü, commonly referred to as Anadolu Efes or simply Efes, is a professional basketball team based in Istanbul, Turkey. Founded in 1976, the club was formerly known as Efes Pilsen until 2011. Efes is the 2021–22 Euroleague champion and on the first place of European Club Ranking after the Final Four 2020–21. Efes is also the most successful club in the history of the Turkish Super League (BSL), having won the league's championship 16 times. Efes has won a total of 41 domestic trophies, more than any other Turkish basketball club.

The EuroLeague, known as the Turkish Airlines EuroLeague for sponsorship reasons, 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.