| 1. Round | 11/08/2023 | Brighton & Hove Albion U21 | - | Leeds United U21 | 2:4 |  |
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| 2. Round | 18/08/2023 | Chelsea FC U21 | - | Brighton & Hove Albion U21 | 2:3 | |
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| 3. Round | 25/08/2023 | Everton FC U21 | - | Brighton & Hove Albion U21 | 0:4 | |
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| 4. Round | 01/09/2023 | Brighton & Hove Albion U21 | - | Nottingham Forest U21 | 1:0 | |
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| 5. Round | 23/09/2023 | Brighton & Hove Albion U21 | - | Newcastle United U21 | 1:1 | |
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| 6. Round | 29/09/2023 | Derby County U21 | - | Brighton & Hove Albion U21 | 2:3 | |
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| 7. Round | 29/10/2023 | Arsenal FC U21 | - | Brighton & Hove Albion U21 | 6:3 | |
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| 8. Round | 03/11/2023 | Brighton & Hove Albion U21 | - | Aston Villa U21 | 2:1 | ||||
| 10. Round | 16/12/2023 | Brighton & Hove Albion U21 | - | Leicester City U21 | 0:0 | ||||
| 14. Round | 19/02/2024 | Stoke City U21 | - | Brighton & Hove Albion U21 | 4:3 |  |
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| 17. Round | 15/03/2024 | Brighton & Hove Albion U21 | - | West Ham United U21 | 1:4 | |
Ireland