| 1. Ronde | 13.09.2020 | Real Oviedo | - | FC Cartagena | 0:0 |  |
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| 2. Ronde | 20.09.2020 | FC Cartagena | - | Sporting Gijón | 0:1 | ||||
| 3. Ronde | 27.09.2020 | CD Leganés | - | FC Cartagena | 3:1 | ||||
| 4. Ronde | 04.10.2020 | FC Cartagena | - | CD Lugo | 2:1 | ||||
| 5. Ronde | 11.10.2020 | SD Ponferradina | - | FC Cartagena | 0:2 | ||||
| 6. Ronde | 17.10.2020 | FC Cartagena | - | CF Fuenlabrada | 1:1 | ||||
| 7. Ronde | 21.10.2020 | UD Almería | - | FC Cartagena | 1:1 | ||||
| 8. Ronde | 24.10.2020 | FC Cartagena | - | UD Las Palmas | 3:0 |  |
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| 9. Ronde | 27.10.2020 | Girona FC | - | FC Cartagena | 2:1 |  |
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| 12. Ronde | 15.11.2020 | CD Castellón | - | FC Cartagena | 2:1 | ||||
| 13. Ronde | 21.11.2020 | CD Mirandés | - | FC Cartagena | 4:1 | ||||
| 14. Ronde | 25.11.2020 | FC Cartagena | - | RCD Mallorca | 1:2 | ||||
| 16. Ronde | 02.12.2020 | FC Cartagena | - | Espanyol | 1:3 | ||||
| 21. Ronde | 10.01.2021 | CD Tenerife | - | FC Cartagena | 3:0 | |
Spanje