| U20 World Cup 2011 Colombia - Appearances as Referee |  |
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| 02/08/2011 | Argentina | - | England | 0:0 | 3 | - | - |
| 05/08/2011 | Egypt | - | Austria | 4:0 | 4 | - | - |
| 15/08/2011 | Brazil | - | Spain | 4:2 pso | 4 | - | - |
| U20 World Cup 2011 Colombia - Appearances as Referee | |
|
|
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| 02/08/2011 | Argentina | - | England | 0:0 | 3 | - | - |
| 05/08/2011 | Egypt | - | Austria | 4:0 | 4 | - | - |
| 15/08/2011 | Brazil | - | Spain | 4:2 pso | 4 | - | - |
| Complete name: | Walter Alexander López Castellanos |
| Born: | 25/09/1980 |
| Place of birth: |
Guatemala |
| Nationality: |
Guatemala |