Stadium: Court 1 Round: 62 Ground: Clay
| ITF Hungary F2 Qual | 2018/05/12 10:30 | Andras Necz v Martin Zeljenka | 3-6,6-4,5-7 |
| ITF Hungary F1 Qual | 2018/05/06 08:00 | Andre Biro v Martin Zeljenka | 6-4,7-6 |
| ITF Hungary F1 Qual | 2018/05/05 10:00 | Mark S Meyer v Martin Zeljenka | 3-6,1-6 |
| ITF Poland F1 | 2018/04/28 07:00 | Martin Zeljenka v Duje Ajdukovic | 1-6,3-6 |
| ITF Croatia F3 | 2018/03/18 13:00 | Martin Zeljenka v Nemanja Subanovic | 5-7,1-6 |
| ITF Hungary F8 Qual | 2017/09/02 07:30 | Martin Zeljenka v Philip Aplienz | 4-6,1-6 |
| ITF Hungary F7 Qual | 2017/08/26 09:00 | Dominik Recek v Martin Zeljenka | 7-6,6-2 |
| ITF Hungary F6 Qual | 2017/08/19 07:30 | Martin Zeljenka v Thomas Colautti | 2-6,6-4,1-6 |
| ITF Hungary F1 Qual | 2018/05/05 10:00 | Domen Gostincar v Andre Biro | 2-6,2-6 |
| ITF Dominican Republic F3 | 2017/12/09 15:30 | Domen Gostincar v Rowland Phillips | 1-6,7-6,3-6 |
| ITF Dominican Republic F2 | 2017/12/03 14:00 | Danail Banov v Domen Gostincar | 2-6,6-2,6-3 |
| ITF Dominican Republic F2 | 2017/12/02 13:00 | Domen Gostincar v Aron Pierce | 6-7,6-2,6-1 |
| ITF Estonia F4 | 2017/11/04 16:00 | Harri Heliovaara v Domen Gostincar | 6-0,6-4 |
| ITF Estonia F3 | 2017/10/28 07:00 | Domen Gostincar v Aaro Pollanen | 4-6,6-7 |
| ITF Tunisia F30 | 2017/10/07 08:30 | Nazim Makhlouf v Domen Gostincar | 6-4,7-6 |
| Challenger Portoroz Qual | 2017/08/06 14:40 | Franko Skugor v Domen Gostincar | 6-1,6-1 |