Darüşşafaka Basketbol, commonly also known as Daçka Basketbol or simply Daçka, also known as Darüşşafaka Lassa for sponsorship reasons, is a professional basketball club that is based in Istanbul, Turkey. Darüşşafaka's basketball section, which was founded in 1914, is a part of Darüşşafaka Spor Kulübü multi-sport club, which was founded in 1914. The club's basketball department is their most successful section. The club plays in the Turkish Basketball Super League. Its home arena for national domestic Turkish Super League games is the Darüşşafaka Ayhan Şahenk Sports Hall, with a seating capacity of 3,500, while its home arena for European-wide games is the Volkswagen Arena Istanbul, with a seating capacity of 5,240.

The 2018–19 Turkish Airlines EuroLeague was the 19th season of the modern era of Euroleague Basketball and the eighth under the title sponsorship of the Turkish Airlines. Including the competition's previous incarnation as the FIBA Europe Champions Cup, this was the 62nd season of the premier competition for European men's clubs.