| 1. Round | 21/08/1998 | Sint-Truidense VV | - | Excelsior Mouscron | 0:2 | ||||
| 2. Round | 29/08/1998 | Excelsior Mouscron | - | Lommelse SK | 2:0 | ||||
| 3. Round | 01/09/1998 | RSC Anderlecht | - | Excelsior Mouscron | 1:1 | ||||
| 4. Round | 05/09/1998 | Excelsior Mouscron | - | KRC Harelbeke | 2:2 |  |
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| 5. Round | 09/09/1998 | Sporting Lokeren | - | Excelsior Mouscron | 0:0 | ||||
| 6. Round | 12/09/1998 | Excelsior Mouscron | - | Lierse SK (old) | 0:0 | ||||
| 7. Round | 19/09/1998 | KV Oostende | - | Excelsior Mouscron | 2:4 | |
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| 8. Round | 25/09/1998 | Excelsior Mouscron | - | Standard Liège | 1:5 |
Belgium