| 1. Round | 20/08/2017 | Athletic Club B | - | UD Logroñés | 1:2 |  |
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| 3. Round | 02/09/2017 | Athletic Club B | - | Real Unión | 4:0 |
| 1. Round | 20/08/2017 | Athletic Club B | - | UD Logroñés | 1:2 | |
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| 3. Round | 02/09/2017 | Athletic Club B | - | Real Unión | 4:0 |
| Aitor Seguín Cid | |
| Born: | 27.02.1995 |
| Place of birth: |
Eibar, 
Spain |
| Nationality: |
Spain
|
| Height: | 180 cm |
| Weight: | 71 kg |
| Position(s): | Left Midfielder Left Back |
| Foot: | left |