Wikipedia
EuroLeague
EuroLeague, known as the Turkish Airlines EuroLeague for sponsorship reasons, is the highest level tier and most important professional club basketball competition in Europe, with teams from up to 18 different countries, members of FIBA Europe. For sponsorship reasons, for five seasons starting with 2010–11, it is named the Turkish Airlines EuroLeague. The competition is controlled by the privately held Euroleague Basketball, which is headquartered in Barcelona, Spain, and features clubs that come from a Europe-wide consortium of leading professional basketball leagues, called ULEB.