| 1. Round | 01/11/2023 | SD Gernika | - | Unionistas CF | 0:2 |  |
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| 3. Round | 07/01/2024 | Unionistas CF | - | Villarreal CF | 7:6 pso | ||||
| Round of 16 | 18/01/2024 | Unionistas CF | - | FC Barcelona | 1:3 |
| 1. Round | 01/11/2023 | SD Gernika | - | Unionistas CF | 0:2 | |
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| 3. Round | 07/01/2024 | Unionistas CF | - | Villarreal CF | 7:6 pso | ||||
| Round of 16 | 18/01/2024 | Unionistas CF | - | FC Barcelona | 1:3 |
| Mario Losada Laguna | |
| Born: | 13.05.1997 |
| Place of birth: |
Madrid, 
Spain |
| Nationality: |
Spain
|
| Height: | 175 cm |
| Weight: | 73 kg |
| Position(s): | Centre Forward |
| Foot: | right |