The 2019–20 LEN Champions League was the 57th edition of LEN's premier competition for men's water polo clubs.
The season started on 30 September 2019 and played its last games on 4 March 2020 due to the COVID-19 pandemic.
[1] The draw for the 2019–20 LEN Champions League preliminary round has been conducted in Barcelona.
In the regular season, teams will play against each other home-and-away in a round-robin format.
Also, Pro Recco will participate in the Final 8 as the host of tournament.