FTC-Telekom won their second title after triumphing over Pro Recco in the final.

The team that finish third and fourth will compete in the 2023–24 LEN Euro Cup knockout stage.

AN Brescia Jug AO Dubrovnik (H) Waspo'98 Hannover (H) NC Vouliagmeni OSC Budapest CC Ortigia Radnički Kragujevac (H) CN Barcelona Crvena zvezda Primorac Kotor EN Tourcoing CSM Oradea (H) CN Noisy-le-Sec GS Apollon Smyrnis Endo Plus Service Honvéd ASC Duisburg Primorje Erste Bank Rijeka Dinamo București 7–10 September 2023, Hannover, Germany 7–10 September 2023, Kragujevac, Serbia 8–10 September 2023, Oradea, Romania 8–10 September 2023, Dubrovnik, Croatia The top two from each group make the quarter-finals round.

In regards to countries, all 9 from last season return, with the inclusion of Romania and Montenegro after one and two-season absences, bringing the number up to 11.

The seeded and unseeded clubs consist of the teams that finished first and second in the previous round respectively.

On 18 January 2024, the final four was held in the capital of Malta, Valletta, at the National Pool Complex from the 5 to 7 June 2024.

(CN Marseille) Kostas Kakaris (Pro Recco) Dušan Mandić (FTC-Telekom)