| 3. Round | 02/09/1998 | Lommelse SK | - | KVC Westerlo | 0:1 | ||||
| 5. Round | 09/09/1998 | Lommelse SK | - | KFC Germinal Ekeren | 1:2 |  |
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| 6. Round | 12/09/1998 | Sint-Truidense VV | - | Lommelse SK | 2:1 |  |
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| 7. Round | 20/09/1998 | K.S.C. Eendracht Aalst | - | Lommelse SK | 3:1 | ||||
| 12. Round | 31/10/1998 | Lommelse SK | - | KV Oostende | 3:0 | |
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| 13. Round | 07/11/1998 | Standard Liège | - | Lommelse SK | 1:0 | |
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| 20. Round | 16/01/1999 | KVC Westerlo | - | Lommelse SK | 2:1 | ||||
| 21. Round | 23/01/1999 | Lommelse SK | - | Club Brugge KV | 2:1 | ||||
| 23. Round | 13/02/1999 | Lommelse SK | - | Sint-Truidense VV | 0:1 | ||||
| 30. Round | 24/04/1999 | Lommelse SK | - | Standard Liège | 3:0 | ||||
| 31. Round | 01/05/1999 | KAA Gent | - | Lommelse SK | 2:2 |
Poland