Stadium: MTA 10 Round: 62 Ground: Clay
| ITF M15 Bad Waltersdorf | 2021/08/29 07:00 | Daniil Golubev v Hasan Ibrahim | 0-6,0-6 |
| Challenger Nur-Sultan Qual | 2021/07/18 04:00 | Edan Leshem v Daniil Golubev | 6-0,6-1 |
| ITF M15 Sibenik | 2021/05/16 07:30 | Daniil Golubev v Elgin Khoeblal | 1-6,1-6 |
| ITF M15 St Petersburg | 2021/04/13 13:45 | Daniil Golubev v Savriyan Danilov | 2-6,1-6 |
| ITF M15 St Petersburg | 2021/04/06 14:25 | Daniil Glinka v Daniil Golubev | 6-0,6-0 |
| ITF M25 Biel | 2021/03/29 10:05 | Daniil Golubev v Maximilian Neuchrist | 1-6,0-6 |
| Challenger St. Petersburg Qual | 2021/03/07 11:20 | Daniil Golubev v Aleksandr Nedovyesov | 1-6,0-6 |
| Challenger St. Petersburg | 2021/02/28 12:15 | Ivan Nedelko v Daniil Golubev | 6-0,6-0 |
| ITF M25 Johannesburg Qual | 2021/09/19 09:45 | Leonid Sheyngezikht v Brandon Levendale | 6-0,6-0 |
| ITF M25 Johannesburg | 2021/09/15 09:30 | Leonid Sheyngezikht v Benjamin Lock | 2-6,6-4,6-7 |
| ITF M25 Johannesburg | 2021/09/13 11:30 | Leonid Sheyngezikht v Anro Nel | 6-0,6-2 |
| ITF M25 Johannesburg | 2021/09/13 07:25 | Leonid Sheyngezikht v Neil Oberleitner | 6-3,1-6,10-4 |
| UTR Pro Tennis Series Sofia | 2021/09/03 08:30 | Alexandar Lazarov v Leonid Sheyngezikht | 6-3,5-2 |
| UTR Pro Tennis Series Sofia | 2021/09/02 10:00 | Leonid Sheyngezikht v Viktor Markov | 6-2,5-3 |
| UTR Pro Tennis Series Sofia | 2021/09/01 09:30 | Leonid Sheyngezikht v Alexandru Luca | 6-3,6-2 |
| UTR Pro Tennis Series Sofia | 2021/08/31 06:30 | Leonid Sheyngezikht v Ivan Mikhaylyuk | 6-2,7-5 |