Stadium: Court 6 Round: 54 Ground: Hardcourt outdoor
| ITF Finland F4 | 2018/11/10 11:35 | Saar, Karl Kiur v Sormunen, Jason | 6-2,6-4 |
| ITF Estonia F3 | 2018/11/03 11:00 | Sormunen, Jason v Martins Rocens | 5-7,4-6 |
| ITF Estonia F2 | 2018/10/27 08:00 | David Quayle v Sormunen, Jason | 6-3,6-2 |
| ITF Finland F3 | 2018/08/11 07:00 | Rikkonen, Roni v Sormunen, Jason | 6-2,6-0 |
| ITF Finland F2 Qual | 2018/08/05 10:25 | Hietaranta, Roni Mikael v Sormunen, Jason | 6-2,6-2 |
| ITF Finland F2 Qual | 2018/08/04 10:00 | Sormunen, Jason v Zonder, Ido | 4-6,6-1,6-4 |
| ITF Finland F1 Qual | 2018/07/29 07:00 | Vesanen, Ilari v Sormunen, Jason | 6-1,6-1 |
| ITF Finland F1 Qual | 2018/07/28 07:00 | Tiainen, Hermanni v Sormunen, Jason | 3-6,0-6 |
| ITF Finland F4 | 2018/11/10 08:00 | Fermosell, Jaime v Sillanpaa, Peter | 3-6,6-4,6-3 |
| ITF Finland F3 | 2018/08/13 07:00 | Sillanpaa, Peter v Minin, Matvey | 1-6,0-6 |
| ITF Finland F3 | 2018/08/12 10:55 | Alexander Chepik v Sillanpaa, Peter | 6-7,2-6 |
| ITF Finland F3 | 2018/08/11 12:00 | Sillanpaa, Peter v Tiainen, Hermanni | 6-3,6-3 |
| ITF Finland F2 Qual | 2018/08/04 07:00 | Sillanpaa, Peter v Huurinainen, Sami | 5-7,6-7 |
| Finlande F4, Qualifications Simples | 2017/11/11 08:00 | Gorazd Srbljak v Sillanpaa, Peter | 6-3,6-0 |
| Finlande F4, Qualifications Simples | 2016/11/12 23:00 | Sillanpaa, Peter v Sarpola, Masi | 3-6,2-6 |
| ITF Finland F3 Qual | 2016/08/12 22:00 | Volfson, David v Sillanpaa, Peter | 6-1,6-1 |