Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 Satu Mare | 2023/09/12 08:40 | Martin Zeljenka v Eduard Silviu Schipor | 3-6,7-5,10-6 |
| ITF M15 Satu Mare | 2023/09/11 07:00 | Martin Zeljenka v Alexandru Luca | 6-0,6-7,10-8 |
| ITF M15 Budapest | 2023/09/03 09:30 | Kevin Humpfner v Martin Zeljenka | 6-2,6-2 |
| ITF M15 Budapest | 2023/08/27 07:00 | Alfred Almasi v Martin Zeljenka | 6-4,6-3 |
| ITF M25 Poznan | 2023/08/23 09:55 | Georgii Kravchenko v Martin Zeljenka | 6-1,6-1 |
| ITF M25 Poznan | 2023/08/22 09:00 | Martin Zeljenka v Michalis Sakellaridis | 6-0,6-4 |
| ITF M25 Poznan | 2023/08/21 14:25 | Martin Zeljenka v Adam Bajurko | 6-2,6-3 |
| ITF M15 Kottingbrunn | 2023/08/13 12:00 | Maks Meh v Martin Zeljenka | 6-2,6-3 |