| ITF Czech Republic F1 | 2018/05/13 08:00 | Marek Semjan v Michael Paty | 6-1,6-1 |
| ITF Kazakhstan F4 Qual | 2018/04/15 09:30 | Marek Semjan v Aleksandre Metreveli | 4-6,6-7 |
| ITF Kazakhstan F3 | 2018/04/10 10:00 | Ivan Gakhov v Marek Semjan | 6-2,6-4 |
| ITF Kazakhstan F3 Qual | 2018/04/09 04:00 | Marek Semjan v Ivan Kalinin | 6-4,6-2 |
| ITF Kazakhstan F3 Qual | 2018/04/08 12:25 | Marek Semjan v Igor Timoshenko | 6-3,6-3 |
| ITF Qatar F3 Qual | 2018/03/11 16:05 | Marek Semjan v Palaphoom Kovapitukted | 6-1,6-1 |
| ITF Qatar F2 | 2018/03/06 13:25 | Dominik Kellovsky v Marek Semjan | 4-6,6-3,6-2 |
| ITF Qatar F2 Qual | 2018/03/05 12:30 | Marek Semjan v Alexandru Vasile Manole | 4-6,6-2,6-4 |
| ITF Turkey F12 | 2018/03/24 06:30 | Denis Klok v Martin Bugaj | 6-3,3-6,7-5 |
| ITF Turkey F11 | 2018/03/17 08:30 | Gabriel Donev v Martin Bugaj | 6-2,7-5 |