Ground: Hardcourt outdoor
| UTR Pro Sofia | 2023/09/07 06:30 | Gabriel Donev v Christos Keisidis | 6-3,6-2 |
| UTR Pro Sofia | 2023/09/06 05:00 | Janos Fekete v Gabriel Donev | 0-6,6-3,3-6 |
| UTR Pro Sofia | 2023/09/05 09:02 | Sergo Sikharulidze v Gabriel Donev | 0-6,3-6 |
| ITF M15 Kursumlijska Banja | 2023/08/30 09:05 | Gabriel Donev v Alessandro Bellifemine | 3-6,6-4,2-6 |
| ITF M15 Targu Jiu | 2023/08/15 13:45 | Lorenzo Joaquin Rodriguez v Gabriel Donev | 6-7,7-6,6-4 |
| ITF M15 Curtea de Arges | 2023/08/09 10:35 | Gabriel Donev v Luciano Emanuel Ambrogi | 0-6,4-6 |
| ITF M25 Pitesti | 2023/08/01 06:30 | Gabriel Donev v Quentin Folliot | 6-4,5-7,1-6 |
| ITF M15 Sofia | 2023/07/04 09:40 | Gabriel Donev v Denis Klok | 5-7,1-6 |
| ITF M15 Naples | 2023/03/01 16:25 | ZhengQing Ji v Lukas H Lilleengen | 7-5,6-3 |
| ITF M15 Naples | 2023/02/28 14:30 | Arthur Bonnaud v Lukas H Lilleengen | 2-6,5-7 |
| ITF M15 Naples | 2023/02/20 15:00 | Oren Vasser v Lukas H Lilleengen | 6-3,0-6,10-2 |
| ITF M15 Bagnoles-de-l'Orne | 2023/01/25 10:00 | Lukas H Lilleengen v Constantin Bittoun Kouzmine | 2-6,6-3,3-6 |
| ITF M15 Bagnoles-de-l'Orne | 2023/01/23 14:10 | Lukas H Lilleengen v Maxence Rivet | 6-3,2-6,10-7 |
| ITF M15 Bagnoles-de-l'Orne | 2023/01/22 14:00 | Lukas H Lilleengen v Louis Larue | 6-2,6-1 |
| ITF M15 Vilnius | 2023/01/15 08:00 | Lukas H Lilleengen v Henrik Bladelius | 5-7,4-6 |
| ITF M25 Monastir | 2022/10/24 08:00 | Lukas H Lilleengen v Ye Cong Mo | 0-6,1-6 |