Stadium: Ustron 2 Round: 25 Ground: Clay
| ITF Qatar F4 | 2017/12/06 12:00 | Marek Semjan v Antoine Escoffier | 2-6,3-6 |
| ITF Qatar F4 | 2017/12/05 12:00 | Hamad Almohannadi v Marek Semjan | 1-6,0-6 |
| ITF Qatar F4 Qual | 2017/12/04 12:00 | Fran Zvonimir Zgombic v Marek Semjan | 2-6,6-1,3-6 |
| ITF Qatar F4 Qual | 2017/12/03 15:05 | Martin Nygaard v Marek Semjan | 2-6,2-6 |
| ITF Czech Republic F11 | 2017/11/22 11:35 | Dominik Kellovsky v Marek Semjan | 6-3,7-6 |
| ITF Czech Republic F11 Qual | 2017/11/19 13:00 | Marek Semjan v Nenad Vladusic | 6-3,7-6 |
| ITF Czech Republic F10 | 2017/11/13 11:30 | Tomas Machac v Marek Semjan | 6-4,6-3 |
| Challenger Bratislava Qual | 2017/11/04 10:20 | Franko Skugor v Marek Semjan | 6-2,6-1 |
| ITF Poland F6 Qual | 2017/07/17 11:30 | Michal Mikula v Dominik Nazaruk | 7-5,4-6,4-6 |
| ITF Poland F6 Qual | 2017/07/16 10:30 | Michal Mikula v Daniil Tsebrenko | 6-2,6-1 |
| ITF Poland F5 Qual | 2017/07/10 09:40 | Farzin Danny Amiri v Michal Mikula | 6-4,6-2 |
| ITF Poland F5 Qual | 2017/07/09 08:00 | Tomislav E Papac v Michal Mikula | 2-6,2-6 |
| ITF Poland F5 Qual | 2017/07/08 07:00 | Davide Innocenti v Michal Mikula | 3-6,2-6 |
| ITF Poland F4 | 2017/07/04 09:00 | Ewan Moore v Michal Mikula | 6-2,6-2 |
| ITF Poland F2 | 2017/06/22 09:30 | Michal Mikula v Andrea Vavassori | 2-6,4-6 |
| ITF Poland F2 | 2017/06/20 09:00 | Gabriele Moghini v Michal Mikula | 1-6,6-4,5-7 |