The 2002–03 LEN Champions League was the 40th edition of LEN's premier competition for men's water polo clubs. It ran from 16 October 2002 to 17 May 2003, and it was contested by 29 teams. The Final Four (semifinals, final, and third place game) took place on May 16 and May 17 in Genoa.
Preliminary round
Key to colors in group tablesGroup winners and runners-up advanced to Final four
Blue Group
Red Group
Final Four (Genoa)
Final standings
Team Pro Recco Honvéd HAVK Mladost Spandau 04
Jesús Rollán, Alberto Angelini, Luca Giustolisi, Danilo Ikodinović, Simone Mina, Vladimir Vujasinović, Daniele Bettini, Tibor Benedek, Paolo Petronelli, Alessandro Calcaterra, Massimiliano Ferretti, Alessandro Caliogna, Alberto GhibelliniHead coachMarco Baldineti
See also 2002–03 LEN Cup Winners' Cup 2002–03 LEN Cup