| ITF M15 Sozopol | 2021/10/05 13:30 | Sarp Agabigun v Gabriel Donev | 5-7,5-7 |
| ITF M15 Sozopol | 2021/09/15 08:30 | George Lazarov v Gabriel Donev | 6-1,6-3 |
| ITF M15 Ulcinj | 2021/09/10 09:00 | Gabriel Donev v Edoardo Lavagno | 1-6,2-6 |
| ITF M15 Ulcinj | 2021/09/09 09:50 | Aziz Kijametovic v Gabriel Donev | 5-7,6-7 |
| ITF M15 Ulcinj | 2021/09/08 08:00 | Gabriel Donev v Dusan Rajic | 6-4,6-7,7-5 |
| ITF M15 Ulcinj | 2021/09/03 08:55 | Gabriel Donev v Ignacio Carou | 4-6,3-6 |
| ITF M15 Ulcinj | 2021/09/02 08:30 | Gorazd Srbljak v Gabriel Donev | 1-6,6-7 |
| ITF M15 Telavi | 2021/08/04 08:45 | Evgeny Philippov v Gabriel Donev | 2-6,3-6 |
| ITF M25 Nur-Sultan | 2021/10/28 05:00 | Yan Sabanin v Ivan Liutarevich | 4-6,6-4,6-3 |
| ITF M25 Nur-Sultan | 2021/10/27 06:50 | Jonathan Baron v Ivan Liutarevich | 2-6,2-6 |
| ITF M25 Nur-Sultan | 2021/10/22 05:30 | Filip Peliwo v Ivan Liutarevich | 6-2,6-2 |
| ITF M25 Nur-Sultan | 2021/10/21 05:00 | Ivan Liutarevich v Uladzimir Ignatik | 1-6,6-4,7-5 |
| ITF M25 Nur-Sultan | 2021/10/19 05:05 | Ivan Liutarevich v Ivan Zaytsev | 1-6,6-3,10-4 |
| ITF M25 Nur-Sultan | 2021/10/18 09:35 | Ivan Liutarevich v Arslanbek Aitkulov | 6-1,6-2 |
| ITF M15 Kazan | 2021/10/16 08:00 | Alibek Kachmazov v Ivan Liutarevich | 6-4,6-7,6-4 |
| ITF M15 Kazan | 2021/10/15 10:05 | Sanjar Fayziev v Ivan Liutarevich | 4-6,6-3,6-7 |