2022–23 LEN Euro Cup

The 2022–23 LEN Euro Cup is the 31st edition of the second-tier European tournament for men's water polo clubs. And it is the first year with the expanded format and presence of the LEN Challenger Cup. The winners were A-Híd Vasas Plaket of Hungary, who defeated RN Savona of Italy on aggregate 23-15 in the final.

Schedule
The schedule of the competition is as follows.

Qualification round I
The top four ranked sides from each group advance. The 5th and 6th place teams continue in the LEN Challenger Cup

Group A

 * 13–16 October 2022, Thessaloniki, Greece.

Group B

 * 13–16 October 2022, Syracuse, Sicily, Italy.

Group C

 * 13–16 October 2022, Kranj, Slovenia.

Group D

 * 13–16 October 2022, Barcelona, Spain.

Qualification round II
The qualified teams from Qualification Round I and the eliminated teams from the 2022-23 LEN Champions League Qualification Round I & II. The top two ranked sides from each group advance to the eighth-finals.

Group A

 * 27–30 October 2022, Šabac, Serbia

Group B

 * 28–30 October 2022, Strasbourg, France.

Group C

 * 28–30 October 2022, Duisburg, Germany.

Group D

 * 27–30 October 2022, Zagreb, Croatia.

Group E

 * 28–30 October 2022, Szolnok, Hungary.

Group F

 * 27–30 October 2022, Bucharest, Romania.

Eighth-finals
The twelve best teams from the 2nd qualification round of the Euro Cup and the four eliminated teams from the Champions League 3rd Qualification Round were drawn into 8 pairings, played on a home & away leg.