Stadium: C Round: 26 Ground: Clay
| ITF Finland F1 | 2017/07/31 07:00 | Alexander Vasilenko v Siimar, Mattias | 3-6,6-2,4-6 |
| ITF Estonia F1 | 2017/07/25 13:50 | Siimar, Mattias v Lazdins, Arturs | 1-6,2-6 |
| ITF Poland F4 | 2017/07/06 10:45 | Siimar, Mattias v Bensoussan, Samuel | 4-6,2-6 |
| ITF Poland F4 | 2017/07/05 10:40 | Siimar, Mattias v Oleg Prihodko | 6-1,4-6,6-0 |
| ITF Poland F4 Qual | 2017/07/03 08:00 | Siimar, Mattias v Piotr Grynkowski | 6-2,6-2 |
| ITF Poland F4 Qual | 2017/07/02 13:00 | Siimar, Mattias v Siimar, Kristofer | 6-3,7-5 |
| ITF Poland F4 Qual | 2017/07/01 13:00 | Siimar, Mattias v Alessandro Ingarao | 6-1,6-3 |
| ITF Poland F3 | 2017/06/28 09:00 | Siimar, Mattias v Eriksson, Markus | 2-6,1-6 |
| ITF Finland F1 | 2017/07/31 07:00 | Pollanen, Aaro v Landa, Maxim | 6-2,4-6,6-3 |
| Challenger Tampere Qual | 2017/07/22 08:30 | Pollanen, Aaro v Niklas-Salminen, Patrick | 6-7,6-7 |
| ITF Sweden F2 Qual | 2017/05/13 08:15 | Pollanen, Aaro v Samuelsson, Eric | 6-3,1-6,0-6 |
| ITF Qatar F2 Qual | 2017/04/08 12:00 | Shabib, Mohamed v Pollanen, Aaro | 6-3,6-1 |
| ITF Qatar F1 Qual | 2017/04/03 12:00 | Bogdan Bobrov v Pollanen, Aaro | 6-3,6-3 |
| ITF Qatar F1 Qual | 2017/04/02 13:00 | Thakran, Siddharth v Pollanen, Aaro | 1-6,3-6 |
| ITF Finland F4 | 2016/11/15 23:00 | Pollanen, Aaro v Khomentovskiy, Matvey | 2-6,4-6 |
| ITF Finland F4 | 2016/11/14 23:00 | Pollanen, Aaro v Otto Virtanen | 6-2,6-0 |