Stadium: Central Round: 62 Ground: Hardcourt outdoor
| ITF M15 Madrid | 2021/10/28 09:30 | Lucas Bouquet v Stefanos Sakellaridis | 6-4,6-2 |
| ITF M15 Madrid | 2021/10/27 08:00 | Jaime Caldes v Stefanos Sakellaridis | 3-6,1-6 |
| ITF M25 Madrid | 2021/10/26 08:00 | Stefan Micov v Stefanos Sakellaridis | 4-6,6-7 |
| ITF M15 Girona | 2021/10/17 13:00 | Stefanos Sakellaridis v Giuseppe Tresca | 6-2,1-6,7-10 |
| UTR Pro Tennis Series Zadar | 2021/10/03 08:00 | Stefanos Sakellaridis v Mile Matic | 5-7,4-5 |
| UTR Pro Tennis Series Zadar | 2021/10/02 11:30 | Stefanos Sakellaridis v Myroslav Bondar | 6-2,5-0 |
| 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 |
| ITF M25 Pardubice | 2021/09/20 09:00 | Mikalai Haliak v Sandro Szic | 7-6,6-4 |
| ITF M25 Wroclaw | 2021/06/30 09:30 | Sandro Szic v Daniel Michalski | 1-6,2-6 |
| ITF M15 Valldoreix | 2021/05/09 12:00 | Rishab Agarwal v Sandro Szic | 6-2,6-0 |
| ITF M25 Poznan | 2020/08/24 08:00 | Maciej Rajski v Sandro Szic | 6-2,6-2 |
| ITF M25 Poznan | 2020/08/23 08:00 | Alan Bojarski v Sandro Szic | 6-2,5-7,1-10 |
| ITF M15 Olomouc | 2019/10/16 11:25 | Jaroslav Pospisil v Sandro Szic | 6-2,6-3 |
| ITF M15 Koszalin | 2019/08/06 14:00 | Mateusz Terczynski v Sandro Szic | 6-0,6-1 |
| ITF M15 Wroclaw | 2019/07/01 08:00 | Sandro Szic v Tomas Liska | 6-2,2-6,9-11 |