| A(D) | Club | VS | MD | |
|---|---|---|---|---|
| 31(129) | Benetton Treviso | Colomiers | 19-Sep-1998 | Match Details |
| 29(129) | Stade Francais | Leinster | 25-Sep-1998 | Match Details |
| 29(269) | Ebbw Vale | Toulouse | 19-Sep-1998 | Match Details |
| 28(146) | Padova | Neath | 10-Oct-1998 | Match Details |
| 28(52) | Ulster | Edinburgh Rugby | 19-Sep-1998 | Match Details |
| 28(37) | Leinster | Stade Francais | 17-Oct-1998 | Match Details |
| 28(302) | Scarlets | Stade Francais | 31-Oct-1998 | Match Details |
| 28(253) | Colomiers | Ulster | 30-Jan-1999 | Match Details |
| 27(359) | Pontypridd | Colomiers | 26-Sep-1998 | Match Details |
| 27(333) | Glasgow Warriors | Benetton Treviso | 18-Oct-1998 | Match Details |
| 26(43) | Perpignan | Munster | 31-Oct-1998 | Match Details |
| 24(104) | Begles-Bordeaux | Stade Francais | 19-Sep-1998 | Match Details |
| 24(3) | Toulouse | Edinburgh Rugby | 11-Oct-1998 | Match Details |
| 24(271) | Munster | Colomiers | 12-Dec-1998 | Match Details |
| 23(168) | Edinburgh Rugby | Toulouse | 11-Oct-1998 | Match Details |
| 22(360) | Neath | Munster | 17-Oct-1998 | Match Details |
MD = Match date,
A(D) = Age(days).