| Veikkausliiga 2021 Abstieg - Appearances as Referee |  |
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 |
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| 16/10/2021 | Haka Valkeakoski | - | FC Lahti | 1:1 | 6 | - | 1 |
| Veikkausliiga 2021 Abstieg - Appearances as Referee | |
|
|
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| 16/10/2021 | Haka Valkeakoski | - | FC Lahti | 1:1 | 6 | - | 1 |
| Complete name: | Petri Juhani Viljanen |
| Born: | 00/00/1987 |
| Place of birth: |
Finland |
| Nationality: |
Finland |