| Champions League 2012/2013 - Appearances as Referee |  |
 |
 |
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| 02/10/2012 | CFR Cluj | - | Manchester United | 1:2 | 1 | - | - |
| 06/11/2012 | Dinamo Kiev | - | FC Porto | 0:0 | 3 | - | - |
| 04/12/2012 | Olympiakos Piraeus | - | Arsenal FC | 2:1 | 5 | - | - |
| 12/02/2013 | Celtic FC | - | Juventus | 0:3 | 6 | - | - |
| Champions League 2012/2013 - Appearances as Referee | |
|
|
||||
| 02/10/2012 | CFR Cluj | - | Manchester United | 1:2 | 1 | - | - |
| 06/11/2012 | Dinamo Kiev | - | FC Porto | 0:0 | 3 | - | - |
| 04/12/2012 | Olympiakos Piraeus | - | Arsenal FC | 2:1 | 5 | - | - |
| 12/02/2013 | Celtic FC | - | Juventus | 0:3 | 6 | - | - |
| Complete name: | Alberto Undiano Mallenco |
| Born: | 08/10/1973 |
| Place of birth: |
Pamplona, 
Spain |
| Residence: | Ansoain |
| Nationality: |
Spain |
| Height: | 181 cm |
| Weight: | 73 kg |