Stadium: Court 2 Round: 62 Ground: Clay
| ITF - M15 Kursumlijska Banja | 2023/05/31 10:20 | Balj, Alexandar v Gorazd Srbljak | 5-7,4-6 |
| ITF - M15 Kursumlijska Banja | 2023/05/23 14:00 | Kristjan Tamm v Balj, Alexandar | 6-4,6-3 |
| ITF - M25 Kursumlijska Banja | 2023/05/14 09:30 | Daljev, Pavle v Balj, Alexandar | 6-1,6-0 |
| ITF - M25 Kursumlijska Banja | 2023/05/08 12:20 | Wang, Chukang v Balj, Alexandar | 6-4,6-4 |
| ITF - M25 Kursumlijska Banja | 2023/05/07 08:00 | Balj, Alexandar v Filip Cebic | 6-4,6-4 |
| Split, Singles M-ITF-CRO-05A | 2023/04/18 09:45 | Luka Miklavcic v Balj, Alexandar | 1-6,6-0,10-6 |
| ITF - M15 Antalya | 2023/04/02 07:00 | Federico Mirgone v Balj, Alexandar | 7-5,6-4 |
| ITF - M15 Monastir | 2022/12/04 10:00 | Alexis Canter v Balj, Alexandar | 6-2,6-0 |
| UTR Pro Thessaloniki | 2023/04/28 05:00 | Keisidis, Christos v Andreas Loizas | 2-5 |
| UTR Pro Thessaloniki | 2023/04/27 05:00 | Keisidis, Christos v Samuel Kyjaci | 3-6,2-6 |
| UTR Pro Thessaloniki | 2023/04/26 09:43 | Ivan Kremenchutskyi v Keisidis, Christos | 2-6,7-6,7-6 |
| UTR Pro Thessaloniki | 2023/04/25 06:30 | Antonescu, Vasile v Keisidis, Christos | 6-4,6-3 |
| UTR - Série Pro - Beograd | 2023/04/22 07:30 | Keisidis, Christos v Matija Samardzic | 3-6,0-5 |
| UTR - Série Pro - Beograd | 2023/04/21 08:46 | Keisidis, Christos v Petr Nesterov | 3-6,4-0 |
| UTR - Série Pro - Beograd | 2023/04/20 06:00 | Keisidis, Christos v Vanja Hodzic | 6-2,6-2 |
| UTR - Série Pro - Beograd | 2023/04/19 08:05 | Radomir Tomic v Keisidis, Christos | 6-0,6-2 |