| European Amateur Championship | 2020/03/18 16:00 | Niva, Heikki v Hancorn, Ben | 3-3 |
| Riga Masters 2017 | 2018/08/23 08:00 | Niva, Heikki v van Hove-Speltincx, Kevin | 3-4 |
| Riga Masters 2017 | 2017/08/24 14:00 | 힉스 앤디 v Niva, Heikki | 4-1 |
| Riga Masters 2017 | 2017/07/05 06:10 | Niva, Heikki v 윌리엄스, 마크 | 0-1 |
| Riga Masters 2017 | 2017/07/05 05:14 | 데이, 라이언 v Niva, Heikki | 1-0 |
| Riga Masters 2017 | 2017/07/03 05:45 | 빈타우, 얜 v Niva, Heikki | 1-0 |
| Riga Masters 2017 | 2017/07/03 04:59 | Niva, Heikki v 쥴롱 조우 | 0-1 |