| 2. Round | 05/08/2023 | KRC Genk | - | KAS Eupen | 0:1 | ||||
| 3. Round | 13/08/2023 | KAS Eupen | - | Club Brugge KV | 0:5 | ||||
| 5. Round | 26/08/2023 | KAS Eupen | - | Oud-Heverlee Leuven | 3:1 | ||||
| 7. Round | 17/09/2023 | KAS Eupen | - | Standard Liège | 1:3 |  |
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| 8. Round | 24/09/2023 | KAA Gent | - | KAS Eupen | 2:1 | ||||
| 9. Round | 30/09/2023 | KAS Eupen | - | RSC Anderlecht | 1:3 | |
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| 10. Round | 08/10/2023 | Royal Antwerp FC | - | KAS Eupen | 4:1 | ||||
| 11. Round | 20/10/2023 | Union Saint-Gilloise | - | KAS Eupen | 4:1 | ||||
| 12. Round | 28/10/2023 | KAS Eupen | - | Sporting Charleroi | 2:0 | ||||
| 13. Round | 03/11/2023 | Sint-Truidense VV | - | KAS Eupen | 1:1 | ||||
| 14. Round | 11/11/2023 | KAS Eupen | - | RWD Molenbeek | 1:3 | ||||
| 15. Round | 25/11/2023 | Cercle Brugge | - | KAS Eupen | 2:0 | ||||
| 16. Round | 02/12/2023 | KAS Eupen | - | KV Kortrijk | 1:1 | ||||
| 17. Round | 10/12/2023 | KAS Eupen | - | KRC Genk | 1:3 | ||||
| 20. Round | 26/12/2023 | Oud-Heverlee Leuven | - | KAS Eupen | 3:0 | |
England