| UTR Pro Tennis Series Sofia | 2021/09/03 07:00 | George Lazarov v Christos Keisidis | 6-4,6-4 |
| UTR Pro Skopje | 2024/07/01 07:00 | Matias Ponce De Leon v George Lazarov | 4-6,6-2,6-1 |
| ITF M25 Kursumlijska Banja | 2024/06/02 06:30 | Stefan Latinov v George Lazarov | 6-4,6-1 |
| ITF M15 Kursumlijska Banja | 2024/05/30 10:30 | George Lazarov v Oleg Prihodko | 3-6,1-6 |
| ITF M15 Kursumlijska Banja | 2024/05/29 10:00 | Daniel Cowan Jr v George Lazarov | 2-6,0-6 |
| ITF M15 Kursumlijska Banja | 2024/05/28 06:30 | Shendrit Deari v George Lazarov | 2-6,2-6 |
| ITF M15 Kursumlijska Banja | 2024/05/27 06:30 | Aleksandar Andic v George Lazarov | 1-6,1-6 |
| ITF M15 Kursumlijska Banja | 2024/05/26 08:30 | George Lazarov v Sergis Kyratzis | 6-4,6-3 |
| ITF M15 Kursumlijska Banja | 2024/05/16 10:15 | Fabrizio Andaloro v George Lazarov | 6-3,6-3 |
| UTR Pro Athens | 2023/12/17 14:00 | Janos Fekete v Christos Keisidis | 6-2,6-5 |
| UTR Pro Athens | 2023/12/17 10:45 | Christos Keisidis v Ioannis Kountourakis | 6-3,6-6 |
| UTR Pro Athens | 2023/12/14 08:30 | Christos Keisidis v Stephanos Schinas | 6-4,5-3 |
| UTR Pro Athens | 2023/12/13 08:02 | Christos Keisidis v Gergely Madarasz | 2-6,4-5 |
| UTR Pro Athens | 2023/12/12 10:15 | Christos Keisidis v Peter Goldsteiner | 6-1,7-6 |
| UTR Pro Athens | 2023/12/11 07:00 | Christos Keisidis v Christos Antonopoulos | 6-2,3-6,6-6 |
| UTR Pro Dubai | 2023/11/26 05:00 | Christos Keisidis v Milan Drinic | 3-6,1-3 |
| UTR Pro Dubai | 2023/11/25 09:23 | Koray Kirci v Christos Keisidis | 6-4,3-6,1-5 |