| Champions League 2017/2018 - Appearances as Referee |  |
 |
 |
||||
| 12/09/2017 | Olympiakos Piraeus | - | Sporting CP | 2:3 | 6 | - | - |
| 17/10/2017 | NK Maribor | - | Liverpool FC | 0:7 | 3 | - | - |
| 06/12/2017 | RB Leipzig | - | Beşiktaş | 1:2 | 4 | 1 | - |
| Champions League 2017/2018 - Appearances as Referee | |
|
|
||||
| 12/09/2017 | Olympiakos Piraeus | - | Sporting CP | 2:3 | 6 | - | - |
| 17/10/2017 | NK Maribor | - | Liverpool FC | 0:7 | 3 | - | - |
| 06/12/2017 | RB Leipzig | - | Beşiktaş | 1:2 | 4 | 1 | - |
| 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 |