| 1. Round | 05/09/1990 | Lierse SK (old) | - | KV Mechelen | 0:4 | ||||
| 5. Round | 14/09/1990 | K. Beerschot VAV | - | KV Mechelen | 2:2 | ||||
| 8. Round | 06/10/1990 | KV Mechelen | - | KRC Genk | 6:0 | ||||
| 10. Round | 21/10/1990 | Cercle Brugge | - | KV Mechelen | 0:2 | ||||
| 13. Round | 12/11/1990 | KV Mechelen | - | RFC Liège | 2:0 |  |
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| 14. Round | 16/11/1990 | KAA Gent | - | KV Mechelen | 2:1 | ||||
| 15. Round | 23/11/1990 | KV Mechelen | - | KV Kortrijk | 3:2 | ||||
| 17. Round | 07/12/1990 | KV Mechelen | - | KFC Germinal Ekeren | 2:1 |
Belgium