The first qualifying round will have 8 teams playing in two-game series (home and away), the winners of which will advance to the second qualifying round. The losers of these two-game series will play in the 2009-10 Eurocup.
The 4 teams that survived the first qualifying round will play each other in the second qualifying round. The second qualifying round will be played as two-game series (home and away), the winners of which advance to the 2009-10 Euroleague regular season. The losers of these two-game series will play the 2009-10 Eurocup.
Round-robin system. Each team plays 10 games within its group. The best 4 teams from each group advance to the Top 16.
Round-robin system. Each team plays 6 games within its group. The best two teams from each group advance to the Quarterfinal Playoffs.
Best-of-five series between first- and second-placed finishers from the Top 16. The four series winners advance to the Final Four
The four quarterfinals winners will meet in single-game semifinals The semifinals losers will play one game for third place The semifinals winners will play in the single-game Final The winner of the Final will be the Euroleague Champion