| 8. Round | 24/09/2023 | Cercle Brugge | - | Union Saint-Gilloise | 0:2 | ||||
| 5. Round | 28/09/2023 | RWD Molenbeek | - | Union Saint-Gilloise | 2:3 | ||||
| 9. Round | 01/10/2023 | Union Saint-Gilloise | - | Sporting Charleroi | 3:1 | ||||
| 10. Round | 08/10/2023 | Sint-Truidense VV | - | Union Saint-Gilloise | 0:4 | ||||
| 13. Round | 05/11/2023 | Union Saint-Gilloise | - | Club Brugge KV | 2:1 | ||||
| 14. Round | 12/11/2023 | Union Saint-Gilloise | - | KV Kortrijk | 3:0 |  |
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| 15. Round | 26/11/2023 | KAA Gent | - | Union Saint-Gilloise | 1:1 | ||||
| 16. Round | 03/12/2023 | Union Saint-Gilloise | - | Cercle Brugge | 2:1 | ||||
| 17. Round | 10/12/2023 | Sporting Charleroi | - | Union Saint-Gilloise | 1:3 | ||||
| 18. Round | 17/12/2023 | Union Saint-Gilloise | - | KV Mechelen | 1:0 | ||||
| 19. Round | 23/12/2023 | KAS Eupen | - | Union Saint-Gilloise | 1:2 | ||||
| 20. Round | 26/12/2023 | Club Brugge KV | - | Union Saint-Gilloise | 1:1 | ||||
| 21. Round | 21/01/2024 | Union Saint-Gilloise | - | Sint-Truidense VV | 2:1 | |
 |
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| 22. Round | 28/01/2024 | RSC Anderlecht | - | Union Saint-Gilloise | 2:2 |
Ecuador