Stadium: Court 1 Round: 25 Ground: Clay
| ITF Serbia F1 Qual | 2018/08/04 07:00 | Stefan Cizelj-Zivkovic v Dusan Obradovic | 6-7,6-3,2-6 |
| 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 Kursumlijska Banja | 2023/06/04 13:00 | Charles Dossetter v Stefan Cizelj-Zivkovic | 2-6,0-6 |
| ITF M15 Kursumlijska Banja | 2023/05/30 12:30 | Nikita Mashtakov v Stefan Cizelj-Zivkovic | 6-1,6-1 |
| ITF M15 Kursumlijska Banja | 2023/05/24 07:00 | Andrea Picchione v Stefan Cizelj-Zivkovic | 6-3,6-1 |
| ITF M15 Telde | 2023/04/09 09:00 | Stefan Cizelj-Zivkovic v Vicente O Moratalla | 3-6,3-6 |
| ITF M15 Antalya | 2023/03/05 06:30 | Rimpei Kawakami v Stefan Cizelj-Zivkovic | 6-0,6-1 |
| ITF M15 Antalya | 2023/02/26 07:00 | Artem Cherepin v Stefan Cizelj-Zivkovic | 3-6,6-2,10-4 |
| ITF M15 Sarajevo | 2023/06/09 08:55 | Matej Dodig v Dusan Obradovic | 6-3,6-4 |
| ITF M15 Sarajevo | 2023/06/08 07:00 | Brandon Walkin v Dusan Obradovic | 6-3,6-7,4-6 |
| ITF M15 Sarajevo | 2023/06/06 12:45 | Dusan Obradovic v Juan Bautista Otegui | 6-4,6-4 |
| ITF M15 Brcko | 2023/05/25 07:30 | Mohamed Safwat v Dusan Obradovic | 6-4,6-0 |
| ITF M15 Brcko | 2023/05/23 10:00 | Amaury Raynel v Dusan Obradovic | 6-1,6-7,5-7 |
| ITF M15 Prijedor | 2023/05/20 10:30 | Viacheslav Bielinskyi v Dusan Obradovic | 6-3,6-4 |
| ITF M15 Prijedor | 2023/05/20 07:00 | Dusan Obradovic v Amaury Raynel | 6-4,6-0 |
| ITF M15 Prijedor | 2023/05/19 08:55 | Michiel de Krom v Dusan Obradovic | 4-6,2-6 |