Stadium: Court 7 Round: 44 Ground: Clay
| ITF M15 Kursumlijska Banja | 2023/09/10 09:30 | Alexandar Balj v Stefan Cizelj-Zivkovic | 6-2,6-2 |
| ITF M15 Madrid | 2023/09/05 10:00 | Stefan Cizelj-Zivkovic v Luis Francisco | 3-6,2-6 |
| ITF M15 Madrid | 2023/09/04 07:30 | Stefan Cizelj-Zivkovic v Cian Maguire | 6-3,6-7,10-6 |
| ITF M15 Madrid | 2023/09/03 12:00 | Tommaso Carnevale-Miino v Stefan Cizelj-Zivkovic | 6-7,2-6 |
| ITF M25 Gandia | 2023/07/17 10:00 | Patricio Alvarado v Stefan Cizelj-Zivkovic | 6-4,6-2 |
| ITF M15 Kursumlijska Banja | 2023/06/14 10:20 | Stefan Cizelj-Zivkovic v Dusan Obradovic | 4-6,1-6 |
| ITF M25 Kursumlijska Banja | 2023/06/06 10:40 | Stefan Cizelj-Zivkovic v Novak Novakovic | 1-6,1-6 |
| ITF M25 Kursumlijska Banja | 2023/06/05 15:10 | Marko Andrejic v Stefan Cizelj-Zivkovic | 3-6,3-6 |
| ITF M25 Maribor | 2023/09/06 13:40 | Maximilian Figl v Jerko Brkic | 3-6,6-3,7-5 |
| ITF M25 Maribor | 2023/09/05 10:35 | Luka Miklavcic v Jerko Brkic | 6-7,2-6 |
| ITF M25 Maribor | 2023/09/04 13:05 | Jerko Brkic v Luka Vuglar | 6-1,6-3 |
| ITF M25 Maribor Qual | 2023/09/03 10:10 | Jerko Brkic v Pietro R Scomparin | 4-6,7-6,12-10 |
| ATP Umag | 2023/07/22 16:50 | Timofey Skatov v Jerko Brkic | 6-2,6-2 |
| ITF M15 Sarajevo | 2023/06/06 10:00 | Marko Stakusic v Jerko Brkic | 6-4,6-4 |
| ITF M15 Sarajevo | 2023/06/05 08:00 | Jerko Brkic v Gabriel Schenekenberg | 6-2,6-4 |
| ITF M15 Sarajevo | 2023/06/04 07:00 | Strahinja Musicki v Jerko Brkic | 2-6,1-6 |