2020–21 LEN Euro Cup

The 2020–21 LEN Euro Cup was the 29th edition of the second-tier European tournament for men's water polo clubs.

Teams
The labels in the parentheses show how each team qualified for the place of its starting round: The labels in the parentheses show how each team qualified for the place of its starting round:
 * CL: Transferred from the LEN Champions League
 * Q: Losers from the qualifying round

Schedule
The schedule of the competition is as follows.

Qualification round
The qualification round is scheduled for 4–6 December 2020.

Knockout phase

 * Bracket