Stadium: Court 8 Round: 62 Ground: Clay
| ITF M25 Osijek | 2023/08/07 12:20 | Maks Meh v Maurus Malgiaritta | 6-3,1-6,3-10 |
| ITF M25 Osijek | 2023/08/06 10:00 | Maks Meh v Adam Krischke | 5-7,6-2,10-7 |
| ITF M25 Osijek | 2023/08/06 10:00 | Martin Zeljenka v Marcell Bartakovics | 3-6,3-6 |
| ITF M25 Telfs | 2023/07/16 07:00 | Stepan Pecak v Martin Zeljenka | 6-4,1-6,10-2 |
| ITF M15 Kursumlijska Banja | 2023/06/19 09:25 | Marko Stakusic v Martin Zeljenka | 6-3,6-3 |
| ITF M15 Kursumlijska Banja | 2023/06/18 07:00 | Martin Zeljenka v Dmitrii Vasilev | 6-3,6-4 |
| ITF M15 Nyiregyhaza | 2023/06/05 09:30 | Peter Nad v Martin Zeljenka | 7-5,6-3 |
| ITF M15 Nyiregyhaza | 2023/06/04 14:30 | Gabor Hornung v Martin Zeljenka | 6-7,7-5,5-10 |
| ITF M15 Osijek | 2023/05/02 10:30 | Emanuele Mazzeschi v Martin Zeljenka | 6-3,6-3 |
| ITF M15 Kursumlijska Banja | 2023/04/24 09:35 | Miha Vetrih v Martin Zeljenka | 4-6,6-4,10-5 |