Stadium: C Round: 45 Ground: Clay
| ITF Finland F4 Qual | 2016/11/11 23:00 | Hermanni Tiainen v Jason Sormunen | 6-2,7-5 |
| ITF Lithuania F1 | 2018/07/21 10:00 | Hermanni Tiainen v Matheus P De Almeida | 3-6,0-6 |
| ITF Turkey F20 Qual | 2018/05/21 07:30 | Cengiz Aksu v Hermanni Tiainen | 6-1,6-1 |
| ITF Turkey F20 Qual | 2018/05/20 09:00 | Hermanni Tiainen v Nabi Kustepe | 6-2,6-0 |
| ITF Turkey F20 Qual | 2018/05/19 07:30 | Hermanni Tiainen v Jesse Paul Krattiger | 6-4,6-4 |
| ITF Turkey F19 Qual | 2018/05/12 07:30 | Sergey Bolotov v Hermanni Tiainen | 6-4,6-4 |
| ITF Turkey F17 | 2018/04/29 07:30 | Linus Krohn v Hermanni Tiainen | 7-5,6-7,6-4 |
| ITF Greece F5 | 2018/03/24 07:30 | Hermanni Tiainen v Duje Ajdukovic | 0-6,4-6 |
| ITF Greece F3 | 2018/03/10 10:00 | Evan Fragistas v Hermanni Tiainen | 6-1,6-1 |
| ITF Lithuania F1 | 2018/07/21 07:00 | Jason Sormunen v Tomas Vaise | 2-6,4-6 |
| ITF Finland F4 Qual | 2017/11/11 08:00 | Jason Sormunen v Roni Rikkonen | 3-6,3-6 |
| ITF Finland F1 Qual | 2017/07/29 07:30 | Alex Hedman v Jason Sormunen | 6-3,6-0 |
| ITF Finland F4 Qual | 2016/11/11 23:00 | Hermanni Tiainen v Jason Sormunen | 6-2,7-5 |