Estadio: Court 4 Round: 44 Ground: Clay
| ITF M15 Warmbad-Villach | 2023/05/23 08:50 | Sebastian Fanselow v Marko Andrejic | 6-0,6-2 |
| ITF M25 Kursumlijska Banja | 2023/05/10 12:05 | Marko Andrejic v Andrey Chepelev | 3-6,6-7 |
| ITF M25 Kursumlijska Banja | 2023/05/09 10:10 | Marko Andrejic v Maxim Krapivin | 6-7,0-6 |
| ITF M25 Kursumlijska Banja | 2023/05/08 08:40 | Marko Andrejic v Luka Todorovic | 6-2,6-2 |
| ITF M15 Kursumlijska Banja | 2023/05/02 07:00 | Marko Andrejic v Simone Agostini | 1-6,6-1,4-10 |
| ITF M15 Kursumlijska Banja | 2023/05/01 11:40 | Marko Andrejic v Stijn Pel | 6-2,7-6 |
| ITF M15 Kursumlijska Banja | 2023/04/27 07:00 | Marko Andrejic v Denis Klok | 2-6,4-6 |
| ITF M15 Kursumlijska Banja | 2023/04/26 10:00 | Marko Andrejic v Tarik Bajrovic | 6-4,6-2 |
| 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 15 Antalya | 2023/03/05 06:30 | Rimpei Kawakami v Stefan Cizelj-Zivkovic | 6-0,6-1 |
| ITF 15 Antalya | 2023/02/26 07:00 | Artem Cherepin v Stefan Cizelj-Zivkovic | 3-6,6-2,10-4 |
| ITF M25 Antalya | 2023/02/05 07:00 | Lorenzo Joaquin Rodriguez v Stefan Cizelj-Zivkovic | 7-5,6-2 |
| ITF M25 Antalya | 2023/01/29 07:30 | Stefan Cizelj-Zivkovic v Emir Sutekin | 3-6,0-6 |