Round: 25 Ground: Hardcourt indoor
| 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 Poland F3 | 2017/06/27 14:10 | Siimar, Mattias v Kris Krawcewicz | 6-3,6-2 |
| ITF Poland F3 Qual | 2017/06/26 09:00 | Karl Friberg v Siimar, Mattias | 4-6,6-2,0-6 |
| ITF Estonia F1 | 2017/07/23 07:00 | Parts, Robin Erik v Lazdins, Arturs | 3-6,1-6 |
| ITF Lithuania F1 | 2017/07/19 11:10 | Lazdins, Arturs v Gelhardt, Luca | 3-6,2-6 |
| ITF Lithuania F1 | 2017/07/18 12:25 | Galyamov, Mikhail v Lazdins, Arturs | 6-7,4-6 |
| ITF Portugal F9 | 2017/06/24 10:30 | Salgado, Afonso v Lazdins, Arturs | 6-4,6-2 |
| ITF Egypt F10 | 2017/03/22 08:50 | Lazdins, Arturs v Hossam, Youssef | 1-6,3-6 |
| ITF Egypt F9 | 2017/03/11 08:00 | Merino, Alexander v Lazdins, Arturs | 7-5,7-6 |
| ITF Egypt F8 | 2017/03/08 12:50 | Lazdins, Arturs v Pauwels, Maxime | 6-3,2-6,6-7 |
| Egypt F7, Singles Qualifying | 2017/03/01 12:20 | Lazdins, Arturs v Alcantara, Francis Casey | 5-7,3-6 |