Stadium: Court 15 Round: 25 Ground: Clay
| 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 F4 | 2018/05/24 08:00 | Hajek, Petr v David Pichler | 4-6,5-7 |
| ITF Poland F4 | 2018/05/22 12:10 | Hajek, Petr v Kozielski, Lukasz | 6-3,6-1 |
| ITF Bosnia and Herzegovina F1 | 2018/05/17 09:45 | Hajek, Petr v Delic, Mate | 6-7,5-7 |
| ITF Bosnia and Herzegovina F1 | 2018/05/15 08:00 | Stergiou, Ioannis v Hajek, Petr | 6-1,3-6,6-7 |
| ITF Austria F3 | 2018/07/18 08:00 | Petr Michnev v Michael Vrbensky | 1-6,2-6 |
| ITF Austria F3 | 2018/07/16 15:35 | Petr Michnev v Vujic, Marko | 6-1,6-1 |
| ITF Czech Republic F6 | 2018/07/11 10:50 | Petr Michnev v Rio Noguchi | 4-6,4-6 |
| ITF Czech Republic F6 | 2018/07/10 09:35 | Petr Nouza v Petr Michnev | 2-6,1-6 |
| ITF Czech Republic F5 | 2018/07/02 11:30 | Oscar Jose Gutierrez v Petr Michnev | 6-3,6-2 |
| Challenger Poprad Tatry Qual | 2018/06/16 07:30 | Dubrivnyy, Artem v Petr Michnev | 6-4,6-2 |
| ITF Hungary F4 | 2018/06/13 08:00 | Brunner, Pascal v Petr Michnev | 6-2,2-6,6-1 |
| ITF Hungary F4 | 2018/06/11 13:00 | Hansson, Gustav v Petr Michnev | 6-0,1-6,2-6 |