| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2024/2025 | Flora | UEFA Conference League | 0 | 0 | 0 | 0 | 0 | – |
| 2024/2025 | Flora | UEFA Champions League | 0 | 0 | 0 | 0 | 0 | – |
| 2023/2024 | Flora | UEFA Champions League | 2 | 0 | 0 | 0 | 0 | – |
| 2023/2024 | Flora | UEFA Conference League | 2 | 0 | 0 | 0 | 0 | – |
| 2023 | Estonia | Club Friendlies | 0 | 0 | 0 | 0 | 0 | – |
| 2022/2023 | Flora | UEFA Conference League | 2 | 0 | 0 | 1 | 0 | – |
| 2021/2022 | Flora | UEFA Conference League | 8 | 0 | 0 | 1 | 0 | 7.0 |
| 2021/2022 | Flora | UEFA Champions League | 4 | 0 | 0 | 0 | 0 | – |
| 2021/2022 | Flora | UEFA Europa League | 2 | 0 | 0 | 1 | 0 | – |
| 2020/2021 | Flora | UEFA Champions League | 1 | 0 | 0 | 1 | 0 | – |
| 2020/2021 | Flora | UEFA Europa League | 3 | 0 | 0 | 0 | 0 | – |
| 2019/2020 | Flora | UEFA Europa League | 4 | 1 | 0 | 0 | 0 | – |
| 2015/2016 | Jagiellonia Białystok | UEFA Europa League | 3 | 0 | 0 | 0 | 0 | – |
| 2011/2012 | Koper | UEFA Europa League | 2 | 0 | 0 | 0 | 0 | – |
| 2007/2008 | FCI Levadia | UEFA Champions League | 1 | 0 | 0 | 0 | 0 | – |
| 2005/2006 | FCI Levadia | UEFA Champions League | 2 | 0 | 0 | 1 | 0 | – |
| Total | 36 | 1 | 0 | 5 | 0 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| 01 Jan 2011 | Nafta | Koper | Unknown | |
| - | Koper | Amkar Perm | Transfer | |
| - | Amkar Perm | Piast Gliwice | Transfer | |
| 07 Jan 2015 | Piast Gliwice | Jagiellonia Białystok | Transfer | |
| 07 Jan 2017 | Jagiellonia Białystok | Piast Gliwice | Transfer | |
| 01 Jan 2019 | Piast Gliwice | Flora | Free Transfer |
K. Vassiljev career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.