Stadium: Center Court Round: 54 Ground: Clay
| ITF M15 Kottingbrunn | 2023/08/13 12:00 | Maks Meh v Martin Zeljenka | 6-2,6-3 |
| 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 M25 Astana | 2023/07/31 05:50 | Louis Allen v Mykhailo Mossur | 6-4,3-6,12-14 |
| ITF M25 Bacau | 2023/07/25 07:00 | Stefan A Andreescu v Louis Allen | 6-4,6-2 |
| ITF M25 Bacau | 2023/07/24 09:00 | Filip Gabriel Bara v Louis Allen | 4-6,2-6 |
| ITF M25 Bacau | 2023/07/23 08:30 | Leon Formella v Louis Allen | 2-6,4-6 |
| ITF M25 Brasov | 2023/07/02 06:30 | Markus Wunder v Louis Allen | 6-3,6-3 |
| ITF M15 Monastir | 2023/05/31 08:30 | Francois Musitelli v Louis Allen | 6-4,6-0 |
| ITF M15 Monastir | 2023/05/22 08:30 | Louis Allen v Mehdi Benchakroun | 4-6,2-6 |
| ITF M15 Monastir | 2023/05/21 10:00 | Lorenzo Lorusso v Louis Allen | 3-6,2-6 |