Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Sarajevo | 2023/06/07 07:00 | Luka Mikrut v Stefan Kostic | 6-2,6-1 |
| ITF M25 Kiseljak | 2023/05/30 10:55 | Nicolas Zanellato v Stefan Kostic | 6-1,6-1 |
| ITF M15 Brcko | 2023/05/23 10:00 | Stefan Kostic v Alexandre Aubriot | 0-6,1-6 |
| ITF M15 Prijedor | 2023/05/19 07:00 | Tim Ruehl v Stefan Kostic | 6-1,6-1 |
| ITF M15 Doboj | 2023/05/10 08:00 | Kirill Mishkin v Stefan Kostic | 6-2,1-6,6-1 |
| ITF M15 Zlatibor | 2022/09/11 09:45 | Stefan Kostic v Milos Vukovic | 0-6,3-6 |
| ITF M25 Osijek | 2023/08/11 10:35 | Romeo Hadzimehmedovic v Sebastian Prechtel | 2-6,0-6 |
| ITF M25 Osijek | 2023/08/10 11:10 | Marcell Bartakovics v Romeo Hadzimehmedovic | 4-6,1-6 |
| ITF M25 Osijek | 2023/08/09 09:25 | Domagoj Biljesko v Romeo Hadzimehmedovic | 7-5,6-7,1-6 |
| ITF M25 Osijek | 2023/08/08 10:55 | Michael Gloeckler v Romeo Hadzimehmedovic | 2-6,6-2,6-10 |
| ITF M25 Osijek | 2023/08/07 13:55 | Alexandar Balj v Romeo Hadzimehmedovic | 2-6,5-7 |
| ITF M25 Osijek | 2023/08/07 07:30 | Pavel Gula v Romeo Hadzimehmedovic | 4-6,3-6 |
| ITF M15 Novi Sad | 2023/07/24 07:30 | Tom Paris v Romeo Hadzimehmedovic | 6-1,7-6 |
| ITF M15 Novi Sad | 2023/07/23 07:00 | Marsel Znuderl v Romeo Hadzimehmedovic | 6-4,2-6,11-13 |