Stadium: Court 2 Round: 54 Ground: Carpet indoor
| ITF Czech Republic F8 | 2018/10/29 10:00 | Semjan, Marek v Michal Lusovsky | 6-3,7-5 |
| ITF Czech Republic F7 | 2018/10/24 10:05 | Drzewiecki, Karol v Semjan, Marek | 6-1,3-6,6-4 |
| ITF Germany F14 | 2018/10/04 12:40 | Petr Nouza v Semjan, Marek | 6-7,6-0,4-6 |
| ITF Germany F14 | 2018/10/02 11:05 | Semjan, Marek v Laurin Aerne | 6-3,6-3 |
| Hungary F6, Singles | 2018/08/23 14:00 | Semjan, Marek v Rodriguez, Cristian | 7-6,2-6,3-6 |
| Hungary F6, Singles | 2018/08/22 12:10 | Semjan, Marek v Glvac, Andrej | 6-2,6-1 |
| Hungary F6, Singles | 2018/08/20 09:00 | Semjan, Marek v Samuel Puskar | 6-3,6-1 |
| Hungary F6, Singles | 2018/08/19 08:00 | Semjan, Marek v Toth, Gabor-Janos | 6-1,4-6,6-4 |
| ITF Czech Republic F8 | 2018/10/29 11:00 | Vrba, Daniel v Terczynski, Mateusz | 6-3,3-6,4-6 |
| ITF Germany F16 | 2018/10/22 10:00 | Cayre, Paul v Terczynski, Mateusz | 6-1,6-2 |
| ITF Germany F16 | 2018/10/21 10:30 | Mannapov, Alexander v Terczynski, Mateusz | 2-6,2-6 |
| ITF Great Britain F5 | 2018/09/17 09:30 | Terczynski, Mateusz v Taylor, Sam | 6-7,3-6 |
| ITF Great Britain F5 | 2018/09/16 12:00 | Terczynski, Mateusz v Newman-Billington, Joseph | 7-5,6-2 |
| ITF Belgium F10 | 2018/08/28 10:00 | Nikolas Sanchez Izquierdo v Terczynski, Mateusz | 6-1,6-3 |
| ITF Poland F8 | 2018/08/19 09:30 | Terczynski, Mateusz v Mikula, Michal | 6-7,4-6 |
| ITF Poland F6 | 2018/08/07 13:55 | Terczynski, Mateusz v Vladyslav Orlov | 7-5,3-6,1-6 |