Stadium: Court 15 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Kuršumlijska Banja | 2023/09/17 08:30 | Stefan Cizelj-Zivkovic v Jerko Brkic | 3-6,6-4,8-10 |
| ITF M15 Kuršumlijska 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 Kuršumlijska Banja | 2023/06/14 10:20 | Stefan Cizelj-Zivkovic v Dusan Obradovic | 4-6,1-6 |
| ITF M25 Kuršumlijska Banja | 2023/06/06 10:40 | Stefan Cizelj-Zivkovic v Novak Novakovic | 1-6,1-6 |
| ITF M15 Lakewood | 2023/07/03 17:00 | Dominique Rolland v Graham Maassen | 6-4,6-2 |
| ITF M15 South Bend | 2023/06/19 14:00 | Muzammil Murtaza v Graham Maassen | 7-6,7-5 |
| ITF M15 Tabasco | 2023/05/23 19:30 | Christopher Bulus v Graham Maassen | 6-0,6-2 |
| ITF M15 Tabasco | 2023/05/22 16:00 | Alexey Shtengelov v Graham Maassen | 3-6,3-6 |
| ITF M15 Tabasco | 2023/05/21 19:00 | Ricardo Reyna v Graham Maassen | 2-6,6-3,6-10 |
| ITF M25 Xalapa | 2023/05/15 19:30 | Juan Sebastian Osorio v Graham Maassen | 6-0,6-3 |
| ITF M25 Xalapa | 2023/05/14 17:00 | Tobias Sonne v Graham Maassen | 6-4,4-6,10-12 |
| UTR Pro Miki | 2023/04/23 00:30 | Brody Nejedly v Graham Maassen | 3-6,5-6 |