The twelve teams are divided in three groups of four.

Each zone is divided in two groups with a variable number of teams.

From 2010, the competition will feature 12 teams, divided in 4 groups of 3.

From the season 1996-97 the league was divided in 4 groups.

According to this, it could be divided in 3 groups.

The competition is disputed by 16 countries, divided in four groups of 4 teams each one.

Second stage: The eight clubs are divided in 2 groups of 4 teams each.

The teams have been divided in two groups and will play each other once.

The 24 clubs were divided in two groups of 12 teams each.

Those eight teams were divided in two groups of four.