Head to Head
| Europe Friendlies | 2019/08/03 09:30 | Real Sociedad B v Real Unión | L | 1-0 |
| Spain Segunda B Group 2 | 2019/02/24 17:00 | Real Sociedad B v Real Unión | L | 2-1 |
| Spain Segunda B Group 2 | 2018/10/07 15:00 | Real Unión v Real Sociedad B | W | 2-1 |
| Europe Friendlies | 2018/08/18 09:33 | Real Unión v Real Sociedad B | L | 0-3 |
| Spain Segunda B Group 2 | 2018/03/29 10:00 | Real Unión v Real Sociedad B | D | 0-0 |
| Spain Segunda B Group 2 | 2017/11/04 15:00 | Real Sociedad B v Real Unión | L | 2-0 |
| Europe Friendlies | 2017/08/09 16:57 | Real Sociedad B v Real Unión | L | 2-0 |
| Spain Segunda B Group 2 | 2017/01/21 18:00 | Real Unión v Real Sociedad B | D | 2-2 |
| Spain Segunda B Group 2 | 2016/09/04 16:00 | Real Sociedad B v Real Unión | D | 1-1 |
| Spain Segunda B Group 2 | 2016/02/13 15:00 | Real Unión v Real Sociedad B | W | 3-1 |
| Spain Segunda B Group 2 | 2015/09/26 14:30 | Real Sociedad B v Real Unión | W | 0-3 |
| Europe Friendlies | 2015/08/12 17:00 | Real Unión v Real Sociedad B | W | 3-0 |
| Spain Segunda B Group 2 | 2015/01/24 17:00 | Real Unión v Real Sociedad B | W | 4-0 |
| Spain Segunda B Group 2 | 2014/09/06 16:00 | Real Sociedad B v Real Unión | L | 3-0 |