Spain: Tercera Division - Group 4 - Relegation Group |
| 10. Round | Ariznabarra | Balmaseda | 2:3 (1:1, 1:2) | details | 12.06.2021 |
| 9. Round | Somorrostro | Ariznabarra | 1:1 (0:1, 1:0) | details | 05.06.2021 |
| 8. Round | Ariznabarra | Urgatzi | 5:1 (1:1, 4:0) | details | 29.05.2021 |
| 7. Round | Tolosa FC | Ariznabarra | 4:0 | details | 22.05.2021 |
| 6. Round | Ariznabarra | Aurrera Ondarroa | 1:2 (0:1, 1:1) | details | 16.05.2021 |
| 5. Round | Balmaseda | Ariznabarra | 2:0 (1:0, 1:0) | details | 08.05.2021 |
| 4. Round | Ariznabarra | Somorrostro | 4:2 (3:0, 1:2) | details | 02.05.2021 |
| 3. Round | Urgatzi | Ariznabarra | 1:1 (1:0, 0:1) | details | 24.04.2021 |
| 2. Round | Ariznabarra | Tolosa FC | 1:2 (1:1, 0:1) | details | 18.04.2021 |
| 1. Round | Aurrera Ondarroa | Ariznabarra | 1:0 (0:0, 1:0) | details | 11.04.2021 |
Spain: Tercera Division - Group 4 - Main |
| Group B - 22. Round | Basconia | Ariznabarra | 2:0 | details | 20.03.2021 |
| Group B - 21. Round | Ariznabarra | Santurtzi | 0:0 (0:0, 0:0) | details | 14.03.2021 |
| Group B - 18. Round | CD Vitoria | Ariznabarra | 3:0 | details | 10.03.2021 |
| Group B - 20. Round | Lagun Onak | Ariznabarra | 3:0 | details | 06.03.2021 |
| Group B - 19. Round | Ariznabarra | Urduliz | 0:3 (0:1, 0:2) | details | 28.02.2021 |
| Group B - 16. Round | Ariznabarra | Durango | 0:0 (0:0, 0:0) | details | 07.02.2021 |
| Group B - 12. Round | Ariznabarra | San Ignacio | 2:0 (2:0, 0:0) | details | 03.02.2021 |
| Group B - 15. Round | Sodupe | Ariznabarra | 3:1 (0:1, 3:0) | details | 30.01.2021 |
| Group B - 14. Round | Ariznabarra | Anaitasuna FT | 1:1 | details | 24.01.2021 |
| Group B - 11. Round | Ariznabarra | Basconia | 0:1 (0:1, 0:0) | details | 20.01.2021 |
| Group B - 13. Round | Pasaia | Ariznabarra | 0:0 (0:0, 0:0) | details | 16.01.2021 |
| Group B - 9. Round | Ariznabarra | Lagun Onak | 0:2 (0:0, 0:2) | details | 27.12.2020 |
| Group B - 10. Round | Santurtzi | Ariznabarra | 1:0 | details | 19.12.2020 |
| Group B - 8. Round | Urduliz | Ariznabarra | 2:2 | details | 05.12.2020 |
| Group B - 7. Round | Ariznabarra | CD Vitoria | 0:1 | details | 28.11.2020 |
| Group B - 5. Round | Durango | Ariznabarra | 0:1 (0:0, 0:1) | details | 14.11.2020 |
| Group B - 4. Round | Ariznabarra | Sodupe | 1:3 (0:1, 1:2) | details | 08.11.2020 |
| Group B - 3. Round | Anaitasuna FT | Ariznabarra | 1:2 (0:0, 1:2) | details | 31.10.2020 |
| Group B - 2. Round | Ariznabarra | Pasaia | 1:1 (0:1, 1:0) | details | 24.10.2020 |
| Group B - 1. Round | San Ignacio | Ariznabarra | 1:1 (0:1, 1:0) | details | 17.10.2020 |
Spain: Tercera Division - Group 4 - Main |
| 38. Round | Urduliz | Ariznabarra | CAN. | details | 17.05.2020 |
| 37. Round | Ariznabarra | Basconia | CAN. | details | 10.05.2020 |
| 36. Round | Beasain | Ariznabarra | CAN. | details | 03.05.2020 |
| 35. Round | Ariznabarra | Real Sociedad C | CAN. | details | 26.04.2020 |
| 34. Round | Pasaia | Ariznabarra | CAN. | details | 19.04.2020 |
| 33. Round | Ariznabarra | CD Vitoria | CAN. | details | 09.04.2020 |
| 32. Round | Santuxu | Ariznabarra | CAN. | details | 05.04.2020 |
| 31. Round | Ariznabarra | Portugalete | CAN. | details | 29.03.2020 |
| 30. Round | SD Deusto | Ariznabarra | CAN. | details | 22.03.2020 |
| 29. Round | Ariznabarra | Sodupe | CAN. | details | 15.03.2020 |
| 28. Round | Somorrostro | Ariznabarra | 3:0 (1:0, 2:0) | details | 07.03.2020 |
| 27. Round | Gernika | Ariznabarra | 5:0 (1:0, 4:0) | details | 01.03.2020 |
| 26. Round | Ariznabarra | San Ignacio | 1:5 (0:2, 1:3) | details | 22.02.2020 |
| 25. Round | Lagun Onak | Ariznabarra | 1:1 | details | 15.02.2020 |
| 24. Round | Ariznabarra | Tolosa FC | 2:1 (0:1, 2:0) | details | 09.02.2020 |
| 23. Round | Durango | Ariznabarra | 9:0 (2:0, 7:0) | details | 01.02.2020 |
| 22. Round | Ariznabarra | Santurtzi | 0:0 (0:0, 0:0) | details | 25.01.2020 |
| 21. Round | Sestao | Ariznabarra | 4:1 (1:0, 3:1) | details | 19.01.2020 |
| 20. Round | Ariznabarra | Balmaseda | 2:1 | details | 12.01.2020 |
| 19. Round | Ariznabarra | Urduliz | 2:1 (1:0, 1:1) | details | 05.01.2020 |