| Yellow | VS Club | Date | Sections | |
|---|---|---|---|---|
| 5 | AFC Ajax | 21-10-1998 | Group Stage | Match details |
| 3 | FC Porto | 25-11-1998 | Group Stage | Match details |
| 3 | AFC Ajax | 04-11-1998 | Group Stage | Match details |
| 3 | Dinamo Zagreb | 30-09-1998 | Group Stage | Match details |
| 3 | FC Porto | 16-09-1998 | Group Stage | Match details |
| 2 | Juventus | 17-03-1999 | Quarter-finals | Match details |
