Professional men's basketball clubs in Europe can compete in a number of different competitions, including national leagues, regional (multi-national) leagues, and continental competitions. It is therefore possible for clubs from some countries to take part in several levels of competition in the same season. Clubs usually qualify for European competitions through performance in their national or regional leagues, with the exception of wild cards.
Continental competitions
There are currently four competitions which are branded as Europe-wide, two controlled by Euroleague Basketball, and two by FIBA Europe. Clubs which compete in these competitions also play in their national and/or regional leagues. Clubs usually qualify for these competitions based on their performance in the national or regional leagues in the previous season.
The EuroLeague is a competition with currently 18 teams. It has historically been the most prestigious competition in European basketball and is widely recognised as the top-tier league in Europe.
The EuroCup is Euroleague Basketball's secondary competition, and currently made up of 20 teams from around Europe. The two finalists of the EuroCup qualify for the next season's EuroLeague.
The Basketball Champions League, which began in 2016, is FIBA Europe's highest competition. Initially, FIBA established EuroLeague in 1958 but never trademarketed the name which was later taken over by Euroleague Basketball. The Basketball Champions League involves 52 teams.
The Europe Cup is FIBA Europe's secondary competition. 47 teams compete, and the teams which did not enter in the Basketball Champions League regular season have the option to drop down into the regular season of the Europe Cup.