| Europa League 2017/2018 - Appearances as Referee |  |
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| 15/02/2018 | Olympique Lyon | - | Villarreal CF | 3:1 | 4 | - | - |
| Europa League 2017/2018 - Appearances as Referee | |
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| 15/02/2018 | Olympique Lyon | - | Villarreal CF | 3:1 | 4 | - | - |
| Complete name: | Viktor Kassai |
| Born: | 10/09/1975 |
| Place of birth: |
Tatabánya, 
Hungary |
| Residence: | Tatabánya |
| Nationality: |
Hungary |
| Profession: | Reiseverkehrskaufmann |
| Height: | 189 cm |
| Weight: | 79 kg |