Stadium: Indoor 2 Round: 62 Ground: Clay
| ITF M15 Sarajevo | 2023/06/05 08:00 | Nikola Basic v Andrej Djokic | 6-2,6-2 |
| ITF M25 Kiseljak | 2023/05/30 09:45 | Nikola Basic v Joao Eduardo Schiessl | 4-6,0-6 |
| ITF M15 Brcko | 2023/05/22 07:30 | Kirill Mishkin v Nikola Basic | 6-3,6-3 |
| ITF M15 Prijedor | 2023/05/19 10:45 | Nikola Basic v Stefan Popovic | 2-6,5-7 |
| ITF M15 Prijedor | 2023/05/18 16:20 | Drazen Petrovic v Nikola Basic | 7-5,0-6,7-10 |
| ITF M15 Prijedor | 2023/05/18 07:00 | Nikola Basic v Vitali Shvets | 6-2,6-1 |
| ITF M15 Prijedor | 2023/05/17 09:15 | Nikola Basic v Marko Ilic | 6-3,6-4 |
| ITF M15 Doboj | 2023/05/10 08:00 | Nikola Basic v Lautaro Agustin Falabella | 3-6,6-4,5-7 |
| ITF M15 Osijek | 2023/05/03 09:40 | Josip Simundza v Mohamed Safwat | 1-6,1-6 |
| ITF M25 Split | 2023/04/20 10:45 | Gergely Madarasz v Josip Simundza | 7-5,6-2 |
| ITF M25 Split | 2023/04/20 07:30 | Paul Woerner v Josip Simundza | 3-6,2-6 |
| Challenger Split | 2023/04/09 09:20 | Dane Sweeny v Josip Simundza | 6-3,6-3 |
| ITF M25 Dubrovnik | 2023/04/05 12:10 | Josip Simundza v Simon A Ivanov | 2-6,4-6 |
| UTR Pro Zadar | 2023/04/01 12:30 | Josip Simundza v Tim Heger | 6-3,5-4 |
| UTR Pro Zadar | 2023/03/30 06:00 | Oleg Prihodko v Josip Simundza | 6-2,7-5 |
| UTR Pro Zadar | 2023/03/28 08:57 | Andre Biro v Josip Simundza | 6-2,6-3 |