Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Nur-Sultan | 2021/07/19 06:10 | Ergi Kirkin v Benjamin Lock | 5-7,7-6,3-6 |
| Challenger Nur-Sultan Qual | 2021/07/18 09:00 | Danil Ozernoy v Benjamin Lock | 4-6,0-6 |
| Challenger Nur-Sultan | 2021/07/12 06:30 | Yan Bondarevskiy v Benjamin Lock | 2-6,7-6,6-2 |
| Challenger Nur-Sultan | 2021/07/11 06:20 | Vladyslav Manafov v Benjamin Lock | 6-7,3-6 |
| ITF M25 Nur-Sultan | 2021/07/06 09:15 | Vladyslav Manafov v Benjamin Lock | 6-3,6-4 |
| ITF M15 Bergamo | 2021/06/23 11:25 | Daniele Capecchi v Benjamin Lock | 6-4,5-7,6-4 |
| Challenger Forli | 2021/06/13 15:45 | Benjamin Lock v Francesco Forti | 6-2,1-6,4-6 |
| ITF M15 Gaiba | 2021/06/13 09:30 | Mats Rosenkranz v Benjamin Lock | 7-6,7-6 |
| Challenger Nur-Sultan | 2021/07/15 06:00 | Sergiy Stakhovsky v Jason Kubler | 2-6,6-3,2-6 |
| Challenger Nur-Sultan | 2021/07/13 06:10 | Sergiy Stakhovsky v Pavel Kotov | 7-5,6-2 |
| Challenger Porto | 2021/07/03 10:00 | Altug Celikbilek v Sergiy Stakhovsky | 6-2,6-1 |
| Challenger Porto | 2021/07/02 12:00 | Goncalo Oliveira v Sergiy Stakhovsky | 6-7,6-7 |
| Challenger Porto | 2021/06/30 13:45 | Matteo Viola v Sergiy Stakhovsky | 2-6,6-4,5-7 |
| Challenger Porto | 2021/06/28 14:50 | Sergiy Stakhovsky v Go Soeda | 2-6,6-2,7-6 |
| Wimbledon | 2021/06/23 14:15 | Gregoire Barrere v Sergiy Stakhovsky | 7-5,6-3 |
| Wimbledon | 2021/06/22 14:50 | Sergiy Stakhovsky v Go Soeda | 6-3,7-6 |