In each pool, the competition is organised on the basis of a double round-robin system.

In the League Round, the placing of the teams is determined by the number of matches won.

In case of a tie in the number of matches won by two or more teams, they will be ranked on the basis of the following criteria: Match points are awarded as follows: 12 teams will qualify for the Playoff 12: After the end of the League Round, the organizer of the Final Four will be determined.

At each leg, points are awarded to the teams in the same manner as in the Group Round (3 for 3:0 or 3:1, 2 for 3:2 etc.).

The drawing of lots was held in Vienna, Austria on 2 July 2015.