Stadium: Court 3 Round: 26 Ground: Clay
| ITF M15 Constanta | 2022/09/09 07:30 | Gabriel Donev v Sebastian Gima | 7-6,5-7,6-7 |
| ITF M25 Pazardzhik | 2023/10/03 09:50 | Denis Klok v Gabriel Donev | 0-6,0-6 |
| ITF M25 Pazardzhik | 2023/09/27 11:10 | Gabriel Donev v Clement Tabur | 2-6,6-3,1-6 |
| ITF M15 Kursumlijska Banja | 2023/09/21 09:25 | Andrey Chepelev v Gabriel Donev | 6-4,7-6 |
| ITF M15 Kursumlijska Banja | 2023/09/20 11:35 | Gabriel Donev v Dusan Obradovic | 7-5,6-2 |
| UTR Pro Sofia | 2023/09/10 07:00 | Petr Nesterov v Gabriel Donev | 7-6,3-0 |
| UTR Pro Sofia | 2023/09/09 08:52 | Hernando J E Isnardi v Gabriel Donev | 2-6,3-6 |
| UTR Pro Sofia | 2023/09/08 05:00 | Gabriel Donev v Milen Ianakiev | 6-3,5-2 |
| UTR Pro Sofia | 2023/09/07 06:30 | Gabriel Donev v Christos Keisidis | 6-3,6-2 |
| ITF M25 Pazardzhik | 2023/10/03 10:15 | Neil Oberleitner v Sebastian Gima | 4-6,6-2,6-7 |
| ITF M25 Zlatibor | 2023/09/30 08:30 | Andrew Paulson v Sebastian Gima | 6-4,6-1 |
| ITF M25 Zlatibor | 2023/09/29 11:30 | Sebastian Gima v David Pichler | 7-6,6-3 |
| ITF M25 Zlatibor | 2023/09/29 07:30 | Sebastian Gima v Bor Artnak | 6-4,7-5 |
| ITF M25 Zlatibor | 2023/09/28 09:45 | Sebastian Gima v Yuquan Jin | 1-6,6-2,10-5 |
| Challenger Sibiu | 2023/09/18 14:30 | Stefano Travaglia v Sebastian Gima | 7-6,6-3 |
| ITF M15 Constanta | 2023/09/05 10:45 | Sebastian Gima v Lautaro Agustin Falabella | 4-6,4-6 |
| ITF M15 Kursumlijska Banja | 2023/08/31 07:30 | Sebastian Gima v Emile Hudd | 3-6,6-3,3-6 |