| Points | Club | VS Club | Date | |
|---|---|---|---|---|
| 108 | Toulouse | Ebbw Vale | 19-09-1998 | Match details |
| 71 | Stade Francais | Pontypridd | 12-12-1998 | Match details |
| 67 | Perpignan | Padova | 27-09-1998 | Match details |
| 61 | Ulster | Ebbw Vale | 10-10-1998 | Match details |
| 48 | Begles-Bordeaux | Scarlets | 18-10-1998 | Match details |
| 43 | Pontypridd | Glasgow Warriors | 19-09-1998 | Match details |
| 43 | Edinburgh Rugby | Ebbw Vale | 17-10-1998 | Match details |
| 41 | Colomiers | Benetton Treviso | 25-10-1998 | Match details |
| 40 | Glasgow Warriors | Benetton Treviso | 18-10-1998 | Match details |
| 35 | Munster | Padova | 08-11-1998 | Match details |
| 34 | Benetton Treviso | Glasgow Warriors | 26-09-1998 | Match details |
| 34 | Scarlets | Leinster | 06-11-1998 | Match details |
| 33 | Neath | Perpignan | 19-09-1998 | Match details |
| 33 | Leinster | Scarlets | 19-09-1998 | Match details |
| 28 | Ebbw Vale | Ulster | 10-10-1998 | Match details |
| 28 | Padova | Neath | 10-10-1998 | Match details |
