| Spain Tercera - Play-Offs | 2021/05/30 17:00 | Racing Cartagena Mar Menor v FC La Union Atletico | D | 0-0 |
| Spain Tercera - Play-Offs | 2021/05/23 16:30 | FC La Union Atletico v Cartagena FC | W | 3-1 |
| Spain Tercera Group 13 | 2021/05/16 10:00 | FC La Union Atletico v UD Los Garres | L | 0-2 |
| Spain Tercera Group 13 | 2021/05/09 07:30 | CD Bullense v FC La Union Atletico | D | 1-1 |
| Spain Tercera Group 13 | 2021/05/02 09:30 | FC La Union Atletico v UCAM Murcia CF B | W | 1-0 |
| Spain Tercera Group 13 | 2021/04/25 10:00 | UD Los Garres v FC La Union Atletico | D | 0-0 |
| Spain Tercera Group 13 | 2021/04/18 09:30 | FC La Union Atletico v CD Bullense | W | 4-1 |
| Spain Tercera Group 13 | 2021/04/11 10:00 | UCAM Murcia CF B v FC La Union Atletico | L | 1-0 |