Stadium: Court 1 Round: 25 Ground: Clay
| ITF M15 Prijedor | 2021/05/11 11:55 | Gergely Madarasz v Artem Dubrivnyy | 7-6,7-6 |
| ITF M15 St Petersburg | 2021/04/09 08:00 | Alexander Cozbinov v Artem Dubrivnyy | 6-4,6-7,6-3 |
| ITF M15 St Petersburg | 2021/04/08 07:00 | Maxim Ratniuk v Artem Dubrivnyy | 2-6,1-6 |
| ITF M15 St Petersburg | 2021/04/06 07:00 | Jakub Paul v Artem Dubrivnyy | 5-7,1-6 |
| Challenger St. Petersburg | 2021/03/06 09:00 | Altug Celikbilek v Artem Dubrivnyy | 5-7,6-2,6-3 |
| Challenger St. Petersburg | 2021/03/05 08:00 | Artem Dubrivnyy v Andrey Kuznetsov | 6-3,6-7,6-3 |
| Challenger St. Petersburg | 2021/03/03 12:15 | Viktor Durasovic v Artem Dubrivnyy | 5-7,6-3,3-6 |
| Challenger St. Petersburg | 2021/03/02 09:45 | Igor Sijsling v Artem Dubrivnyy | 6-3,4-6,3-6 |
| ITF M15 Prijedor | 2021/05/12 10:30 | Joao Lucas Reis da Silva v Tim Heger | 6-3,7-5 |
| ITF M15 Prijedor | 2021/05/11 09:30 | Alen Rogic-Hadzalic v Tim Heger | 6-3,4-6,7-10 |
| ITF M15 Prijedor | 2021/05/10 13:30 | Nicolas Zanellato v Tim Heger | 6-4,3-6,7-10 |
| ITF M15 Prijedor | 2021/05/09 12:30 | Tadija Radovanovic v Tim Heger | 3-6,3-6 |
| ITF M15 Sibenik | 2021/04/21 08:00 | Tim Heger v Marco Miceli | 3-6,4-6 |
| ITF M15 Sibenik | 2021/04/20 10:05 | George Botezan v Tim Heger | 6-3,4-6,9-11 |
| ITF M15 Sibenik | 2021/04/19 14:30 | Borna Devald v Tim Heger | 3-6,2-6 |
| ITF M15 Opatija | 2021/03/21 11:00 | Ivan Karlo Ban v Tim Heger | 6-3,2-6,10-8 |