| 2. Round | 21/08/1990 | K. Beerschot VAV | - | KRC Genk | 1:1 |  |
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| 4. Round | 01/09/1990 | KSV Waregem | - | KRC Genk | 4:0 | ||||
| 10. Round | 21/10/1990 | Sporting Lokeren | - | KRC Genk | 4:2 | ||||
| 11. Round | 02/11/1990 | KRC Genk | - | Lierse SK (old) | 0:0 | ||||
| 12. Round | 10/11/1990 | Cercle Brugge | - | KRC Genk | 3:1 | ||||
| 13. Round | 13/11/1990 | KRC Genk | - | Club Brugge KV | 2:1 | ||||
| 15. Round | 22/11/1990 | KRC Genk | - | RSC Charleroi | 1:1 |
Belgium