| 3. Round | 02/09/1998 | Sporting Lokeren | - | RSC Charleroi | 3:1 | ||||
| 4. Round | 05/09/1998 | KSK Beveren | - | Sporting Lokeren | 1:2 | ||||
| 5. Round | 09/09/1998 | Sporting Lokeren | - | Excelsior Mouscron | 0:0 | ||||
| 7. Round | 18/09/1998 | Sporting Lokeren | - | Club Brugge KV | 2:0 | ||||
| 9. Round | 03/10/1998 | Sporting Lokeren | - | Sint-Truidense VV | 2:1 | ||||
| 10. Round | 10/10/1998 | Lommelse SK | - | Sporting Lokeren | 1:2 | ||||
| 11. Round | 23/10/1998 | Sporting Lokeren | - | RSC Anderlecht | 2:3 |  |
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| 12. Round | 31/10/1998 | KRC Harelbeke | - | Sporting Lokeren | 3:2 | ||||
| 16. Round | 27/11/1998 | Sporting Lokeren | - | Standard Liège | 4:1 | ||||
| 18. Round | 13/12/1998 | KRC Genk | - | Sporting Lokeren | 3:1 | ||||
| 19. Round | 19/12/1998 | Sporting Lokeren | - | KV Kortrijk | 2:1 | ||||
| 20. Round | 16/01/1999 | RSC Charleroi | - | Sporting Lokeren | 2:1 | |
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| 21. Round | 23/01/1999 | Sporting Lokeren | - | KSK Beveren | 4:3 | ||||
| 22. Round | 30/01/1999 | Excelsior Mouscron | - | Sporting Lokeren | 5:1 |
Belgium