| 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 Ricany | 2021/09/18 10:30 | Stefanos Sakellaridis v Michalis Sakellaridis | 6-2,7-6 |
| UTR Pro Tennis Series Ricany | 2021/09/17 12:00 | Stefanos Sakellaridis v Petr Hajek | 6-7,2-6 |
| UTR Pro Tennis Series Ricany | 2021/09/11 10:30 | Dominik Kellovsky v Stefanos Sakellaridis | 7-5,5-1 |
| UTR Pro Tennis Series Ricany | 2021/09/09 07:30 | Dominik Suc v Stefanos Sakellaridis | 5-7,6-7 |
| ITF M15 Ulcinj | 2021/09/19 08:00 | Drazen Petrovic v Ervin H Eminefendic | 3-6,7-6,6-10 |
| ITF M15 Ulcinj | 2021/09/14 07:55 | Drazen Petrovic v Rimpei Kawakami | 1-6,3-6 |
| Challenger Banja Luka | 2021/09/06 14:30 | Drazen Petrovic v Carlos Gomez-Herrera | 1-6,0-6 |
| ITF M15 Novi Sad | 2021/08/03 09:40 | Aleksandar Tomas v Drazen Petrovic | 6-7,6-0,10-8 |
| ITF M15 Novi Sad | 2021/08/02 08:00 | Drazen Petrovic v Darko Jandric | 6-4,6-0 |
| ITF M15 Novi Sad | 2021/08/01 08:30 | Drazen Petrovic v Milos Vukovic | 6-4,6-2 |
| ITF M15 Doboj | 2021/07/13 08:00 | Dusan Obradovic v Drazen Petrovic | 6-4,6-4 |
| ITF M15 Doboj | 2021/07/12 08:00 | Drazen Petrovic v Janos Fekete | 6-4,2-6,13-11 |