1997–98 LEN Champions League
The 1997–98 LEN Champions League was the 35th edition of LEN's premier competition for men's water polo clubs. It ran from 1997 to 6 June 1998, and it was contested by 16 teams. The Final Four took place on June 5 and June 6 in Zagreb.
Preliminary round
| Key to colors in group tables |
| Group winners and runners-up advanced to [|Final four] |
Final Four ([Zagreb])
Final standings
| Team | |
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