| UTR Pro Beograd | 2023/10/11 07:30 | Stefan Popovic v Christos Keisidis | 6-3,6-2 |
| UTR Pro Beograd | 2023/10/10 12:40 | Tadija Radovanovic v Christos Keisidis | 4-6,3-6 |
| UTR Pro Beograd | 2023/10/08 09:00 | Christos Keisidis v Domagoj Biljesko | 4-6,0-6 |
| UTR Pro Beograd | 2023/10/04 08:44 | Christos Keisidis v Ilya Snitari | 2-6,0-6 |
| UTR Pro Beograd | 2023/10/03 07:30 | Christos Keisidis v Drazen Petrovic | 2-6,5-7 |
| UTR Pro Beograd | 2023/10/02 06:00 | Christos Keisidis v Zoran Ludoski | 4-6,6-7 |
| UTR Pro Olomouc | 2023/09/17 07:30 | Mikolaj Lis v Christos Keisidis | 1-6,3-6 |
| UTR Pro Olomouc | 2023/09/16 10:52 | Christos Keisidis v Jakub Novak | 6-4,7-6 |
| UTR Pro Beograd | 2023/10/11 10:30 | Niksa Arsic v Enrique Bogo | 5-7,1-6 |
| UTR Pro Beograd | 2023/10/10 07:30 | Niksa Arsic v Andrej Nedic | 5-7,2-6 |
| ITF M25 Zlatibor | 2023/09/28 09:25 | Mirza Basic v Niksa Arsic | 6-1,6-2 |
| ITF M25 Zlatibor | 2023/09/27 13:30 | Filippo Mondini v Niksa Arsic | 5-7,1-6 |
| ITF M25 Zlatibor | 2023/09/27 09:00 | Niksa Arsic v Domagoj Biljesko | 6-4,6-4 |
| ITF M25 Zlatibor | 2023/09/26 07:00 | Artem Cherepin v Niksa Arsic | 2-6,6-3,8-10 |
| ITF M15 Kursumlijska Banja | 2023/09/18 12:30 | Jacques-Kai Inoue v Niksa Arsic | 1-6,6-1,10-3 |
| ITF M15 Novi Sad | 2023/08/01 11:05 | Niksa Arsic v Miha Vetrih | 3-6,1-6 |