Men's water polo competitions

The LEN Champions League is the top-tier European professional water polo club competition with teams from up to 18 different countries. It is organized by the Ligue Européenne de Natation.

The LEN Cup Winners' Cup was a European water polo club competition organized by the Ligue Européenne de Natation. National cup winners qualified for the tournament. After 2003, the nationalcup winners qualified for the LEN Euroleague, and the cup was discontinued.

The LEN Euro Cup is the second-tier European water polo club competition run by the Ligue Européenne de Natation for those clubs who did not qualify for the LEN Champions League. The cup was inaugurated in 1992.

The LEN Challenger Cup is a water polo club competition organised by the Ligue Européenne de Natation (LEN). It acts as the third tier, below the LEN Champions League and the LEN Euro Cup. GS Apollon Smyrnis of Greece became the first champions, defeating CN Terrassa of Spain in the final.

The LEN Super Cup is an annual water polo match organized by LEN and contested by the reigning champions of the two European club competitions, the LEN Champions League and the LEN Euro Cup.