| Europa League 2016/2017 - Appearances as Referee |  |
 |
 |
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| 24/11/2016 | Athletic Bilbao | - | Sassuolo Calcio | 3:2 | 7 | - | - |
| 16/03/2017 | AS Roma | - | Olympique Lyon | 2:1 | 8 | - | - |
| Europa League 2016/2017 - Appearances as Referee | |
|
|
||||
| 24/11/2016 | Athletic Bilbao | - | Sassuolo Calcio | 3:2 | 7 | - | - |
| 16/03/2017 | AS Roma | - | Olympique Lyon | 2:1 | 8 | - | - |
| 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 |