Over the history of European-wide club basketball competitions, dating back to the old FIBA European Champions Cup (now known as the EuroLeague), which began in 1958, three European national domestic leagues stood out in prominence under the old ratings system that was based only on basketball game competition results, and was originally overseen by FIBA, and then later by Euroleague Basketball Company.
These were the domestic league rankings that were based on play in the first-tier European competition, the EuroLeague.
These were the domestic league rankings that were based on play in the first-tier European competition, the EuroLeague.
These were the all-time domestic league rankings that were based on play in all of the European continental-wide club basketball competitions, the EuroLeague, the Saporta Cup, the Korać Cup, the EuroCup, the EuroChallenge, and the EuroCup Challenge.
In 2012, Euroleague Basketball decided to update the rankings every year, and take into account the results from the previous seasons.