Stadium: Court 6 Round: 25 Ground: Hardcourt indoor
| ITF M15 St Petersburg | 2021/04/08 09:00 | Daniil Glinka v Jan Satral | 4-6,3-6 |
| ITF M15 St Petersburg | 2021/04/10 08:00 | Jan Satral v Illya Beloborodko | 5-7,3-6 |
| ITF M15 St Petersburg | 2021/04/09 09:40 | Aristarkh Safonov v Jan Satral | 4-6,2-6 |
| ITF M15 St Petersburg | 2021/04/08 09:00 | Daniil Glinka v Jan Satral | 4-6,3-6 |
| ITF M15 St Petersburg | 2021/04/06 10:00 | Alexandr Binda v Jan Satral | 2-6,1-6 |
| ITF M15 Bratislava | 2021/03/11 12:10 | Jan Satral v Jurgen Briand | 6-7,6-4,2-6 |
| ITF M15 Bratislava | 2021/03/10 12:05 | Jan Satral v Lenny Hampel | 6-4,6-3 |
| ITF M15 Sharm El Sheikh | 2021/02/14 07:30 | Jan Satral v Marek Gengel | 2-6,2-6 |
| ITF M15 Sharm El Sheikh | 2021/02/13 07:30 | Nicolas Moreno De Alboran v Jan Satral | 3-6,3-6 |
| ITF M15 St Petersburg | 2021/04/12 08:30 | Daniil Glinka v Alexander Zgirovsky | 7-6,7-6 |
| ITF M15 St Petersburg Qual | 2021/04/11 11:00 | Daniil Glinka v Alexander Stepin | 6-4,6-3 |
| ITF M15 St Petersburg | 2021/04/08 09:00 | Daniil Glinka v Jan Satral | 4-6,3-6 |
| ITF M15 St Petersburg | 2021/04/06 14:25 | Daniil Glinka v Daniil Golubev | 6-0,6-0 |
| ITF M15 St Petersburg | 2021/04/05 11:00 | Daniil Glinka v Yannik Steinegger | 6-2,6-2 |
| ITF M15 St Petersburg | 2021/04/04 10:05 | Daniil Glinka v Stepan Pecak | 7-5,6-1 |
| Challenger St. Petersburg Qual | 2021/03/07 09:35 | Khumoyun Sultanov v Daniil Glinka | 7-6,6-4 |
| Challenger St. Petersburg | 2021/02/28 09:10 | Daniil Glinka v Skander Mansouri | 6-3,6-7,5-7 |