| U21 EURO 2021 Ungarn/Slowenien - Appearances as Referee |  |
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 |
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| 24/03/2021 | Hungary | - | Germany | 0:3 | 2 | - | - |
| 28/03/2021 | Russia | - | France | 0:2 | 2 | - | - |
| 30/03/2021 | Germany | - | Romania | 0:0 | 9 | - | - |
| 31/05/2021 | Denmark | - | Germany | 5:6 pso | 5 | - | - |
| U21 EURO 2021 Ungarn/Slowenien - Appearances as Referee | |
|
|
||||
| 24/03/2021 | Hungary | - | Germany | 0:3 | 2 | - | - |
| 28/03/2021 | Russia | - | France | 0:2 | 2 | - | - |
| 30/03/2021 | Germany | - | Romania | 0:0 | 9 | - | - |
| 31/05/2021 | Denmark | - | Germany | 5:6 pso | 5 | - | - |
| Complete name: | Guillermo Cuadra Fernández |
| Born: | 25/04/1984 |
| Place of birth: |
Madrid, 
Spain |
| Nationality: |
Spain |