Stadium: Center Court Round: 14 Ground: Hardcourt outdoor
| ITF M25 Alkmaar | 2021/06/23 11:15 | Ergi Kirkin v Marko Tepavac | 4-6,3-6 |
| Challenger Almaty | 2021/06/15 11:50 | Zizou Bergs v Ergi Kirkin | 6-4,5-7,6-2 |
| Challenger Almaty | 2021/06/14 04:00 | Ergi Kirkin v Vladyslav Manafov | 6-2,6-3 |
| Challenger Almaty - selejtezők | 2021/06/13 04:00 | Evan Furness v Ergi Kirkin | 4-6,7-6,5-7 |
| Challenger Almaty | 2021/06/06 04:00 | Vitaliy Sachko v Ergi Kirkin | 3-6,7-5,6-2 |
| ITF M25 Most | 2021/05/27 10:45 | Ergi Kirkin v Daniel Michalski | 4-6,0-6 |
| ITF M25 Most | 2021/05/25 11:30 | Viktor Durasovic v Ergi Kirkin | 7-6,5-7,2-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/19 09:45 | Ergi Kirkin v Robin Stanek | 3-6,7-6,4-6 |
| ITF M25 Nur-Sultan | 2021/07/06 08:10 | Martin Borisiouk v Timur Mukhtarulin | 6-1,6-3 |
| ITF M25 Nur-Sultan | 2021/07/05 06:35 | Timur Mukhtarulin v Adil Karakayev | 6-2,6-3 |
| ITF M15 Novomoskovsk | 2021/06/03 15:30 | Oleksandr Ovcharenko v Timur Mukhtarulin | 6-1,6-4 |
| ITF M15 Novomoskovsk | 2021/05/26 09:20 | Timur Mukhtarulin v Nikita Alosha | 5-7,1-6 |
| ITF M15 Novomoskovsk | 2020/09/01 08:30 | Vladimir Ivanov v Timur Mukhtarulin | 6-4,6-0 |
| ITF M25 Irpin | 2019/08/27 07:30 | Timur Mukhtarulin v Oleksii Krutykh | 2-6,0-6 |