| Europa League 2017/2018 - Appearances as Referee |  |
 |
 |
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| 22/02/2018 | AC Milan | - | PFC Ludogorets Razgrad | 1:0 | 2 | - | - |
| 05/04/2018 | RB Leipzig | - | Olympique Marseille | 1:0 | 3 | - | - |
| Europa League 2017/2018 - Appearances as Referee | |
|
|
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| 22/02/2018 | AC Milan | - | PFC Ludogorets Razgrad | 1:0 | 2 | - | - |
| 05/04/2018 | RB Leipzig | - | Olympique Marseille | 1:0 | 3 | - | - |
| Complete name: | Alberto Undiano Mallenco |
| Born: | 08/10/1973 |
| Place of birth: |
Pamplona, 
Spain |
| Residence: | Ansoain |
| Nationality: |
Spain |
| Height: | 181 cm |
| Weight: | 73 kg |