| UTR Pro Tennis Series Zadar | 2021/10/01 08:00 | Janos Fekete v Stefanos Sakellaridis | 6-1,6-6 |
| UTR Pro Tennis Series Zadar | 2021/09/30 09:30 | Christos Keisidis v Stefanos Sakellaridis | 4-6,6-4,6-4 |
| UTR Pro Tennis Series Zadar | 2021/09/28 12:30 | Duje Kekez v Stefanos Sakellaridis | 7-6,6-3 |
| UTR Pro Tennis Series Zadar | 2021/09/27 11:30 | Stefanos Sakellaridis v Drazen Petrovic | 7-6,2-6,5-2 |
| ITF M25 Pardubice | 2021/09/22 11:05 | Daniel Siniakov v Stefanos Sakellaridis | 6-3,6-2 |
| ITF M25 Pardubice | 2021/09/21 08:00 | Daniel Paty v Stefanos Sakellaridis | 3-6,3-6 |
| ITF M25 Pardubice | 2021/09/20 09:00 | Christopher Patzanovsky v Stefanos Sakellaridis | 6-4,1-6,7-10 |
| UTR Pro Tennis Series Ricany | 2021/09/19 07:00 | Lawrence Bataljin v Stefanos Sakellaridis | 0-6,6-6 |
| UTR Pro Tennis Series Zadar | 2021/10/01 11:00 | Myroslav Bondar v Alen Rogic-Hadzalic | 1-6,1-5 |
| UTR Pro Tennis Series Zadar | 2021/09/29 12:30 | Myroslav Bondar v Jose A R Rodriguez | 6-7,5-7 |
| UTR Pro Tennis Series Zadar | 2021/09/28 08:00 | Myroslav Bondar v Admir Kalender | 2-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/09/27 15:30 | Borna Devald v Myroslav Bondar | 6-0,6-1 |
| ITF M15 Vyshkovo | 2021/09/23 08:30 | Danylo Veremeychuk v Myroslav Bondar | 6-4,7-5 |
| ITF M15 Chornomorsk | 2021/08/30 07:00 | Maik Steiner v Myroslav Bondar | 6-4,6-0 |
| ITF M15 Novomoskovsk | 2021/05/23 10:30 | Myroslav Bondar v Aleksandr Braynin | 4-6,1-6 |