Stadium: Grandstand Round: 14 Ground: Clay
| ITF M15 Sozopol | 2021/10/08 07:00 | Alexandar Lazarov v Billy Harris | 4-6,2-6 |
| ITF M15 Sozopol | 2021/10/07 07:00 | Alexandar Lazarov v Adam Jurajda | 6-1,6-4 |
| ITF M15 Sozopol | 2021/10/05 10:00 | Alexandar Lazarov v Petr Nesterov | 6-1,6-1 |
| ATP Sofia | 2021/09/29 15:35 | Alexandar Lazarov v Filip Krajinovic | 0-6,3-6 |
| Challenger Kyiv | 2021/09/05 08:00 | Aleksandr Braynin v Alexandar Lazarov | 7-6,6-4 |
| UTR Pro Tennis Series Sofia | 2021/09/04 06:00 | Alexandar Lazarov v Yurii Dzhavakian | 6-3,6-7,5-1 |
| 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 08:30 | Alexandar Lazarov v Valentin Vanta | 6-4,3-6,5-3 |
| Challenger Meerbusch | 2021/08/08 15:55 | Nicolas Kicker v Bart Stevens | 6-2,6-4 |
| ITF M15 Antalya | 2021/06/02 10:55 | Jakub Paul v Bart Stevens | 6-2,6-4 |
| ITF M15 Antalya | 2021/05/26 12:40 | Bart Stevens v Jakub Paul | 4-6,4-6 |
| ITF M15 Antalya | 2021/05/17 07:00 | Bart Stevens v Miguel Fernando Pereira | 2-6,3-6 |
| ITF M15 Antalya | 2021/05/16 07:00 | Bart Stevens v Onder Balci | 6-3,6-4 |
| ITF M15 Antalya | 2021/05/10 07:00 | Riccardo Di Nocera v Bart Stevens | 6-2,4-6,10-4 |
| ITF M15 Antalya | 2021/05/09 07:00 | Abdulhamid Mubarak v Bart Stevens | 6-7,5-7 |
| ITF M15 Antalya | 2021/04/04 10:00 | Bart Stevens v Gabriele Moghini | 2-6,6-4,8-10 |