Stadium: Court 2 Round: 25 Ground: Clay
| ITF Slovakia F2 | 2018/08/03 08:00 | Hajek, Petr v Paul Jubb | 2-6,4-6 |
| ITF Slovakia F2 | 2018/08/02 13:30 | Rio Noguchi v Hajek, Petr | 1-6,4-6 |
| ITF Slovakia F2 | 2018/08/01 10:40 | Hajek, Petr v Fekiac, Martin | 6-3,6-4 |
| ITF Slovakia F1 | 2018/07/24 10:20 | Hajek, Petr v Petr Michnev | 4-6,6-4,1-6 |
| ITF Czech Republic F6 | 2018/07/11 10:45 | Marek Jaloviec v Hajek, Petr | 6-1,6-2 |
| ITF Czech Republic F6 | 2018/07/09 09:25 | Jan Jermar v Hajek, Petr | 2-6,1-6 |
| ITF Belgium F3 | 2018/07/04 08:00 | Thomas Setodji v Hajek, Petr | 6-4,6-4 |
| ITF Netherlands F1 | 2018/06/27 09:00 | Franco Emanuel Egea v Hajek, Petr | 6-3,6-4 |
| ITF Poland F6 Qual | 2018/08/06 09:50 | Borkowski, Mikolaj v Piatek, Mateusz | 1-6,1-6 |
| ITF Poland F6 Qual | 2018/08/05 09:30 | Piatek, Mateusz v Andrzejczak, Bartlomiej | 6-1,6-2 |
| ITF Poland F4 | 2018/05/20 07:00 | Kucbel, Filip v Piatek, Mateusz | 6-4,4-6,6-3 |
| ITF Poland F3 | 2018/05/13 11:30 | Daciek, Patrick v Piatek, Mateusz | 7-6,6-1 |
| ITF Poland F2 | 2018/05/05 11:00 | Marse-Vidri, Jordi v Piatek, Mateusz | 6-7,6-2,6-2 |
| Tunisia F15, Singles Qualifying | 2018/04/15 09:00 | Robert, Quentin v Piatek, Mateusz | 6-2,6-1 |
| Tunisia F15, Singles Qualifying | 2018/04/14 09:00 | Piatek, Mateusz v Kyrychenko, Oleksander | 7-5,6-1 |
| Tunisia F14, Singles Qualifying | 2018/04/07 11:30 | Piatek, Mateusz v Gorodynskyi, Vladyslav | 3-6,3-6 |