FIBA SuproLeague was the FIBA professional club basketball Champions' Cup for the 2000–01 season. Up until that season, there was one cup, the FIBA European Champions' Cup (which is now called the Euroleague), though in this season of 2000–01, the leading European teams split into two competitions: the FIBA SuproLeague and Euroleague Basketball Company's Euroleague 2000–01.
The Euroleague (or historically called, the European Champions' Cup) was originally established by FIBA and it operated under its umbrella from 1958 until the summer of 2000, concluding with the 1999–00 season. That was when Euroleague Basketball Company was created.
Amazingly, FIBA had never trademarked the "Euroleague" name and Euroleague Basketball simply used it without any legal ramifications because FIBA had no legal recourse to do anything about it, so they had to find a new name for their league. Thus, the following 2000–2001 season started with 2 separate top European professional club basketball competitions: the FIBA SuproLeague (previously known as the FIBA Euroleague) and the brand new Euroleague 2000–01 season.
The first phase was a regular season, in which the twenty competing teams were drawn into two groups, each containing ten teams. Each team played every other team in its group at home and away, resulting in 18 games for each team. The top 8 teams in each group advanced to the Round of 16, and the winners of this round advanced to the Quarter-finals. Both of the rounds were played in a Best-of-three playoff System. The winning teams of the Quarter-finals qualified to the Final Four, which was held in the Palais Omnisports de Paris-Bercy, Paris on 10–13 in May 2001.
In May 2001, Europe had two continental champions, Maccabi Elite of the FIBA SuproLeague and Kinder Bologna of Euroleague Basketball Company's Euroleague. The leaders of both organizations realized the need to come up with a new single competition. Negotiating from the position of strength, Euroleague Basketball Company dictated proceedings and FIBA essentially had no choice but to agree to their terms. As a result, the Euroleague was fully integrated under Euroleague Basketball Company's umbrella and teams that competed in the FIBA SuproLeague during the 2000–01 season joined it as well. It is today officially admitted that European basketball had two champions that year, Maccabi of the FIBA SuproLeague and Kinder Bologna of the Euroleague Basketball Company's Euroleague.
A year later, Euroleague Basketball Company and FIBA decided that Euroleague Basketball's Euroleague competition would be the main basketball tournament on the continent, to be played between the top level teams of Europe. FIBA Europe would also organize a European league for third tier level teams, known as the FIBA Europe League competition, while Euroleague Basketball would also organize its own second tier level league, combining FIBA's long-time Korać Cup and Saporta Cup competitions into one new competition, the Eurocup. In 2005, Euroleague Basketball and FIBA decided to cooperate with each other and have been jointly cooperating since then.
In essence, the authority in European professional basketball was divided over club-country lines. FIBA stayed in charge of national team competitions (like the FIBA EuroBasket, the FIBA World Cup, and the Summer Olympics), while Euroleague Basketball took over the European professional club competitions. From that point on, FIBA's Korać Cup and Saporta Cup competitions lasted only one more season before folding, which was when Euroleague Basketball launched the Eurocup.