The 1998–99 LEN Champions League was the 36th edition of LEN's premier competition for men's water polo clubs. It ran from 1998 to 5 June 1999, and it was contested by 16 teams. The Final Four (semifinals, final, and third place game) took place on June 4 and June 5 in Naples.
| 1998–99 LEN Champions League | |
|---|---|
| League | LEN Champions League |
| Sport | Water Polo |
| Duration | 1998 to 5 June 1999 |
| Number of teams | 8 (preliminary round) 16 (Total) |
| Final Four | |
| Finals champions |  Splitska Banka (1st title) |
| Runners-up |  Bečej |
Preliminary round edit
Location of teams of the 1998–99 LEN Champions League group stage.
Blue Group; 
Red Group.
Blue Group; 
Red Group.| Key to colors in group tables |
|---|
| Group winners and runners-up advanced to Final four |
Blue Group edit
| Team | Pld | W | D | L | GF | GA | GD | Pts |
|---|---|---|---|---|---|---|---|---|
 Posillipo
|
6 | 4 | 0 | 2 | 49 | 43 | +6 | 8 |
| Bečej
|
6 | 3 | 1 | 2 | 56 | 51 | +5 | 7 |
 BVSC
|
6 | 2 | 1 | 3 | 46 | 44 | +2 | 5 |
 Vouliagmeni
|
6 | 2 | 0 | 4 | 44 | 57 | −13 | 4 |
Source: [citation needed]
Red Group edit
| Team | Pld | W | D | L | GF | GA | GD | Pts |
|---|---|---|---|---|---|---|---|---|
 Dynamo Moscow
|
6 | 5 | 0 | 1 | 52 | 38 | +14 | 10 |
| Splitska Banka
|
6 | 5 | 0 | 1 | 58 | 46 | +12 | 10 |
 Catalunya
|
6 | 1 | 1 | 4 | 45 | 53 | −8 | 3 |
 Olympic Nice
|
6 | 0 | 1 | 5 | 41 | 61 | −20 | 1 |
Source: [citation needed]
Final Four (Naples) edit
Final standings edit
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