Stadium: Court 1 Round: 19 Ground: Hardcourt outdoor
| Nur Sultan, Kazakhstan | 2021/07/12 04:00 | Ergi Kirkin v Oleksii Krutykh | 1-6,6-7 |
| Nur Sultan, Kazakhstan | 2021/07/11 04:00 | Ergi Kirkin v Mukhtarulin, Timur | 6-2,6-0 |
| ITF M25 Alkmaar | 2021/06/23 11:15 | Ergi Kirkin v Tepavac, Marko | 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 Manafov, Vladyslav | 6-2,6-3 |
| Challenger Almaty Qual | 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 |
| Challenger Nur-Sultan Qual | 2021/07/18 09:00 | Ozernoy, Danil v Benjamin Lock | 4-6,0-6 |
| Nur Sultan, Kazakhstan | 2021/07/12 06:30 | Bondarevskiy, Yan v Benjamin Lock | 2-6,7-6,6-2 |
| Nur Sultan, Kazakhstan | 2021/07/11 06:20 | Manafov, Vladyslav v Benjamin Lock | 6-7,3-6 |
| ITF M25 Nur-Sultan | 2021/07/06 09:15 | Manafov, Vladyslav v Benjamin Lock | 6-3,6-4 |
| ITF M15 Bergamo | 2021/06/23 11:25 | Capecchi, Daniele v Benjamin Lock | 6-4,5-7,6-4 |
| Forli 6, Italy | 2021/06/13 15:45 | Benjamin Lock v Forti, Francesco | 6-2,1-6,4-6 |
| ITF M15 Gaiba | 2021/06/13 09:30 | Mats Rosenkranz v Benjamin Lock | 7-6,7-6 |
| ITF M15 Gaiba | 2021/06/12 12:35 | Antoine Bellier v Benjamin Lock | 6-7,6-2,6-7 |