Stadium: Court Center Round: 54 Ground: Hardcourt outdoor
| UTR Pro Florida | 2023/05/13 17:33 | Jerry Barton v Kevin Humpfner | 4-1 |
| UTR Pro Florida | 2023/05/12 18:00 | Mikel Anderson v Kevin Humpfner | 1-6,6-1,0-6 |
| UTR Pro Florida | 2023/05/11 20:20 | Oscar Brown v Kevin Humpfner | 7-6,6-5 |
| UTR Pro Florida | 2023/05/09 21:00 | Joao Ceolin v Kevin Humpfner | 4-6,7-5,7-6 |
| UTR Pro Florida | 2023/05/08 18:00 | Kevin Humpfner v Daniel Phillips | 6-0,6-2 |
| ITF M15 Sunrise | 2023/04/11 21:30 | Mikel Anderson v Kevin Humpfner | 2-6,2-6 |
| ITF M15 Sunrise | 2023/04/11 14:00 | Kevin Humpfner v Oren Vasser | 6-1,6-3 |
| UTR Pro Florida | 2023/04/01 14:53 | Kevin Humpfner v Roberto Cid Subervi | 2-6,0-6 |
| 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 |