Stadium: Court 1 Round: 25 Ground: Clay
| ITF Turkey F37 | 2017/09/30 12:00 | Alessandro Coppini v Peter Vajda | 7-6,6-3 |
| ITF Hungary F8 | 2017/09/05 09:25 | Zdenek Kolar v Peter Vajda | 6-2,6-0 |
| ITF Hungary F7 | 2017/08/29 09:30 | Patrik Nema v Peter Vajda | 6-0,6-1 |
| ITF Austria F3 | 2017/07/18 12:50 | Peter Vajda v Pascal Brunner | 2-6,3-6 |
| ITF Italy F21 | 2017/07/10 19:00 | Andrea Pellegrino v Peter Vajda | 6-2,6-4 |
| Challenger Poprad Tatry | 2017/06/20 13:25 | Adam Pavlasek v Peter Vajda | 6-2,6-1 |
| Challenger Bratislava Qual | 2016/11/05 17:15 | Patrik Fabian v Peter Vajda | 7-6,6-1 |
| Challenger Bratislava Qual | 2016/11/05 12:20 | Peter Vajda v Sarp Agabigun | 7-6,6-3 |
| ITF Qatar F1 | 2018/02/27 12:00 | Marek Semjan v Denis Yevseyev | 3-6,6-3,1-6 |
| 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 |