Stadium: Court 2 Round: 54 Ground: Hardcourt outdoor
| ITF - Budapeszt M15 | 2023/09/03 09:30 | Josip Simundza v Gregor Hausberger | 6-1,5-7,12-10 |
| ITF - Osijek M25 | 2023/08/08 11:15 | Dusan Obradovic v Josip Simundza | 6-3,6-4 |
| ITF - Celje M15 | 2023/06/27 08:45 | Josip Simundza v Maurus Malgiaritta | 2-6,6-7 |
| ITF - Celje M15 | 2023/06/26 09:30 | Michal Novansky v Josip Simundza | 2-6,4-6 |
| ITF - Store M15 | 2023/06/20 08:00 | Filip Jeff Planinsek v Josip Simundza | 3-6,6-3,10-8 |
| ITF - Store M15 | 2023/06/19 12:50 | Edison Ambarzumjan v Josip Simundza | 4-6,3-6 |
| ITF - Litija M15 | 2023/06/15 11:50 | Sebastian Prechtel v Josip Simundza | 7-5,6-1 |
| ITF - Litija M15 | 2023/06/14 07:55 | Josip Simundza v Matic Kriznik | 7-6,6-1 |
| ITF - Budapeszt M15 | 2023/09/03 09:30 | Kevin Humpfner v Martin Zeljenka | 6-2,6-2 |
| ITF - Budapeszt M15 | 2023/08/29 14:45 | Hamish Stewart v Kevin Humpfner | 6-7,7-5,7-6 |
| ITF - Budapeszt M15 | 2023/08/28 10:00 | Kevin Humpfner v Matas Vasiliauskas | 6-2,6-2 |
| ITF - Budapeszt M15 | 2023/08/27 13:00 | Tyler Stice v Kevin Humpfner | 3-6,6-4,9-11 |
| ITF - Trier M15 | 2023/08/23 10:30 | Kevin Humpfner v Benedikt Henning | 1-6,4-6 |
| ITF - Trier M15 | 2023/08/21 14:00 | Can Ayral v Kevin Humpfner | 2-6,3-6 |
| ITF - Trier M15 | 2023/08/21 09:30 | Dario Drebenstedt v Kevin Humpfner | 1-6,0-6 |
| UTR Pro - Floryda | 2023/05/13 17:33 | Jerry Barton v Kevin Humpfner | 4-1 |