| 2. Round | 29/08/1998 | Excelsior Mouscron | - | Lommelse SK | 2:0 | ||||
| 14. Round | 14/11/1998 | Excelsior Mouscron | - | K.S.C. Eendracht Aalst | 3:1 | ||||
| 18. Round | 12/12/1998 | Excelsior Mouscron | - | Sint-Truidense VV | 5:1 | ||||
| 20. Round | 15/01/1999 | Excelsior Mouscron | - | RSC Anderlecht | 2:3 |  |
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| 21. Round | 24/01/1999 | KRC Harelbeke | - | Excelsior Mouscron | 0:4 |  |
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| 22. Round | 30/01/1999 | Excelsior Mouscron | - | Sporting Lokeren | 5:1 | ||||
| 23. Round | 12/02/1999 | Lierse SK (old) | - | Excelsior Mouscron | 1:2 | ||||
| 25. Round | 05/03/1999 | Standard Liège | - | Excelsior Mouscron | 2:0 | ||||
| 26. Round | 12/03/1999 | Excelsior Mouscron | - | KAA Gent | 7:1 | |
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| 27. Round | 20/03/1999 | KRC Genk | - | Excelsior Mouscron | 3:0 |
Belgium