Stadium: Court 3 Round: 44 Ground: Clay
| 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 M25 Antalya | 2023/02/05 07:00 | Lorenzo Joaquin Rodriguez v Stefan Cizelj-Zivkovic | 7-5,6-2 |
| ITF M25 Kursumlijska Banja | 2023/06/05 15:40 | Novak Novakovic v Gino Romano | 6-4,7-5 |
| ITF M25 Kursumlijska Banja | 2023/06/04 12:30 | Filip Cebic v Novak Novakovic | 1-6,5-7 |
| ITF M15 Kursumlijska Banja | 2023/06/01 11:30 | Peter Fajta v Novak Novakovic | 6-1,7-6 |
| ITF M15 Kursumlijska Banja | 2023/05/31 07:00 | Novak Novakovic v Nicolas Buitrago | 0-6,7-5,6-4 |
| ITF M15 Kursumlijska Banja | 2023/05/30 10:50 | Novak Novakovic v Gorazd Srbljak | 6-4,6-3 |
| ITF M15 Kursumlijska Banja | 2023/05/29 11:40 | Petr Bar Biryukov v Novak Novakovic | 6-3,3-6,3-10 |
| ITF M25 Kursumlijska Banja | 2023/05/17 13:05 | Novak Novakovic v Mark Lajal | 0-6,4-6 |
| ITF M25 Kursumlijska Banja | 2023/05/16 08:30 | Vanja Petrov v Novak Novakovic | 7-6,3-6,4-10 |