| U20 World Cup 2017 South Korea - Appearances as Assistant | ||||
| 21/05/2017 | Iran | - | Costa Rica | 1:0 |
| 26/05/2017 | Mexico | - | Venezuela | 0:1 |
| 04/06/2017 | Venezuela | - | USA | 2:1 aet |
| U20 World Cup 2017 South Korea - Appearances as Assistant | ||||
| 21/05/2017 | Iran | - | Costa Rica | 1:0 |
| 26/05/2017 | Mexico | - | Venezuela | 0:1 |
| 04/06/2017 | Venezuela | - | USA | 2:1 aet |
| Complete name: | Mathias Klasenius |
| Born: | 25/04/1975 |
| Place of birth: |
Sweden |
| Nationality: |
Sweden |