| 2. Round | 10/04/2021 | Villarrubia CF | - | Atlético Madrid B | 0:2 |  |
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| 4. Round | 24/04/2021 | CP Villarrobledo | - | Atlético Madrid B | 0:2 | ||||
| 5. Round | 02/05/2021 | UD Socuéllamos | - | Atlético Madrid B | 1:0 | |
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| 3. Round | 05/05/2021 | Atlético Madrid B | - | UD Melilla | 0:2 | ||||
| 6. Round | 09/05/2021 | Atlético Madrid B | - | Villarrubia CF | 2:2 | ||||
| 7. Round | 16/05/2021 | UD Melilla | - | Atlético Madrid B | 3:0 | |
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| 8. Round | 22/05/2021 | Atlético Madrid B | - | CP Villarrobledo | 2:1 |
Spain