Stadium: Court 6 Round: 62 Ground: Clay
| 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 |
| ITF M25 Opatija | 2023/03/19 08:00 | Martin Zeljenka v Marko Andrejic | 0-6,2-6 |
| Challenger Szekesfehervar | 2023/03/12 09:00 | Benjamin Hassan v Martin Zeljenka | 6-1,7-6 |
| ITF M15 Porec | 2023/03/05 09:00 | Martin Zeljenka v Igor Dudun | 1-6,2-6 |
| ITF M25 Trnava | 2022/11/28 09:00 | Coleman Wong v Martin Zeljenka | 6-1,6-2 |
| ITF M15 Kursumlijska Banja | 2023/06/12 16:05 | Marko Stakusic v Dmitrii Vasilev | 6-1,6-2 |
| ITF M15 Kursumlijska Banja | 2023/06/11 14:00 | Dmitrii Vasilev v Strahinja Musicki | 6-0,6-1 |
| ITF M25 Kursumlijska Banja | 2023/06/05 07:00 | Alexander Zgirovsky v Dmitrii Vasilev | 6-3,6-2 |
| ITF M25 Kursumlijska Banja | 2023/06/04 07:00 | Dmitrii Vasilev v Federico Hernan Giovanniello | 6-4,6-1 |
| ITF M15 Pazardzhik | 2023/05/22 07:00 | Vicente O Moratalla v Dmitrii Vasilev | 6-0,7-6 |
| ITF M15 Pazardzhik | 2023/05/21 08:00 | Dmitrii Vasilev v Maxim Khorozov | 6-3,6-4 |
| ITF M15 Pazardzhik | 2023/05/16 07:00 | Dmitrii Vasilev v Ioannis Xilas | 1-6,5-7 |
| ITF M15 Pazardzhik | 2023/05/15 10:00 | Simeon Terziev v Dmitrii Vasilev | 6-1,3-6,8-10 |