Stadium: Ciudad Raqueta 8 Round: 62 Ground: Clay
| 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 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 Vienna | 2023/08/27 08:00 | Yvo Panak v Cian Maguire | 6-4,6-2 |
| ITF M15 Huy | 2023/08/20 08:00 | Christopher Patzanovsky v Cian Maguire | 6-4,5-7,10-5 |
| ITF M25 Koksijde | 2023/08/13 09:55 | Cian Maguire v Giacomo Crisostomo | 2-6,1-6 |
| UTR Pro Montrouge | 2023/07/27 09:35 | Cian Maguire v Arthur Bellegy | 2-6,4-3 |
| UTR Pro Montrouge | 2023/07/26 11:55 | Cian Maguire v Yanais Laurent | 3-6,2-6 |
| UTR Pro Montrouge | 2023/07/26 06:00 | Cian Maguire v Valentin Basel | 3-6,2-6 |
| UTR Pro Montrouge | 2023/07/24 09:00 | Cian Maguire v Rayane Oumaouche | 4-6,6-7 |
| ITF M25 Telfs | 2023/07/16 11:30 | Cian Maguire v Petro Orlando Fellin | 4-6,2-6 |