| Spain Tercera Group 4 | 2021/05/15 16:00 | Urduliz FT v Sestao River | W | 0-3 |
| Spain Tercera Group 4 | 2021/05/09 15:30 | Sestao River v Pasaia KE | W | 2-1 |
| Spain Tercera Group 4 | 2021/05/02 14:30 | CD Vitoria v Sestao River | W | 0-1 |
| Spain Tercera Group 4 | 2021/04/25 15:30 | Sestao River v Urduliz FT | D | 1-1 |
| Spain Tercera Group 4 | 2021/04/17 15:00 | Pasaia KE v Sestao River | W | 1-2 |
| Spain Tercera Group 4 | 2021/04/10 16:00 | Sestao River v CD Vitoria | D | 0-0 |
| Spain Tercera Group 4 | 2021/03/20 16:00 | Sestao River v Real Sociedad C | W | 2-0 |
| Spain Tercera Group 4 | 2021/03/13 17:00 | Gernika v Sestao River | L | 1-0 |
| Spain Tercera Group 15 | 2021/05/22 16:00 | Valle Egues v Ardoi | W | 0-4 |
| Spain Tercera Group 15 | 2021/05/08 15:00 | Ardoi v AD San Juan | L | 0-2 |
| Spain Tercera Group 15 | 2021/05/01 15:00 | Beti Kozkor KE v Ardoi | L | 2-1 |
| Spain Tercera Group 15 | 2021/04/17 15:00 | Ardoi v Valle Egues | W | 2-0 |
| Spain Tercera Group 15 | 2021/04/10 15:00 | AD San Juan v Ardoi | D | 1-1 |
| Spain Tercera Group 15 | 2021/03/27 15:30 | Ardoi v Murchante FC | D | 0-0 |
| Spain Tercera Group 15 | 2021/03/13 15:30 | CD Cortes v Ardoi | L | 2-1 |
| Spain Tercera Group 15 | 2021/03/06 16:00 | Ardoi v Pena Sport | D | 1-1 |