| 1. Round | 20/05/2018 | Athletic Club B | - | Villarreal CF B | 1:3 | ||||
| 1. Round | 26/05/2018 | Villarreal CF B | - | Athletic Club B | 0:2 |
| 1. Round | 20/05/2018 | Athletic Club B | - | Villarreal CF B | 1:3 | ||||
| 1. Round | 26/05/2018 | Villarreal CF B | - | Athletic Club B | 0:2 |
| Iker Undabarrena Martínez | |
| Born: | 18.05.1995 |
| Place of birth: |
Gorliz, 
Spain |
| Nationality: |
Spain
|
| Height: | 181 cm |
| Weight: | 77 kg |
| Position(s): | Central Midfielder Defensive Midfielder |
| Foot: | right |