| A(D) | Club | VS | MD | |
|---|---|---|---|---|
| 10(224) | Leinster | Begles-Bordeaux | 09-Oct-1998 | Match Details |
| 14(280) | Munster | Colomiers | 12-Dec-1998 | Match Details |
| 16(201) | Padova | Perpignan | 27-Sep-1998 | Match Details |
| 19(191) | Glasgow Warriors | Pontypridd | 19-Sep-1998 | Match Details |
| 19(214) | Perpignan | Scarlets | 12-Dec-1998 | Match Details |
| 20(50) | Neath | Padova | 31-Oct-1998 | Match Details |
| 21(245) | Ulster | Edinburgh Rugby | 19-Sep-1998 | Match Details |
| 21(261) | Colomiers | Munster | 12-Dec-1998 | Match Details |
| 21(5) | Pontypridd | Glasgow Warriors | 07-Nov-1998 | Match Details |
| 22(276) | Ebbw Vale | Ulster | 30-Oct-1998 | Match Details |
| 25(310) | Benetton Treviso | Colomiers | 19-Sep-1998 | Match Details |
| 25(85) | Edinburgh Rugby | Ulster | 19-Sep-1998 | Match Details |
| 25(148) | Scarlets | Leinster | 19-Sep-1998 | Match Details |
| 26(364) | Toulouse | Edinburgh Rugby | 11-Oct-1998 | Match Details |
| 26(38) | Stade Francais | Begles-Bordeaux | 07-Nov-1998 | Match Details |
| 26(98) | Begles-Bordeaux | Scarlets | 26-Sep-1998 | Match Details |
MD = Match date,
A(D) = Age(days).