Due to the COVID-19 pandemic, the 24-team, two pool tournament format adopted for the previous season remained.

[4][5][6] Twenty-four clubs from the three major European domestic and regional leagues are competing in the Champions Cup.

Below is the list of coaches, captain and stadiums with their method of qualification for each team.

Note: Placing shown in brackets, denotes standing at the end of the regular season for their respective leagues, with their end of season positioning shown through CH for Champions, RU for Runner-up, SF for losing Semi-finalist, and QF for losing Quarter-finalist.

The knockout stage began across the 8/9/10 April with a home and away round of 16 matches consisting of the top eight ranked teams from each pool.