| UTR Pro Tennis Series - Ricany | 2021/09/07 07:30 | Michalis Sakellaridis v Yanais Laurent | 2-6,3-5 |
| UTR Pro Tennis Series - Ricany | 2021/09/06 12:00 | Jan Satral v Michalis Sakellaridis | 6-2,6-2 |
| ITF - M15 - Bad Waltersdorf | 2021/08/30 09:00 | Alberto Morolli v Michalis Sakellaridis | 6-3,6-3 |
| ITF - M15 - Bad Waltersdorf | 2021/08/29 09:00 | Alan Gleeson v Michalis Sakellaridis | 3-6,6-7 |
| ITF - M15 - Bad Waltersdorf | 2021/08/23 07:00 | Michalis Sakellaridis v Fletcher Scott | 1-6,1-6 |
| ITF - M15 - Warmbad-Villach | 2021/08/16 12:30 | Leonardo Rossi v Michalis Sakellaridis | 7-6,6-4 |
| ITF - M15 - Warmbad-Villach | 2021/08/15 15:30 | Michalis Sakellaridis v Francisco Vittar | 7-6,4-6,13-11 |
| ITF - M15 - Novi Sad | 2021/08/01 10:45 | Michalis Sakellaridis v Aleksa Mardjonovic | 2-6,2-6 |
| UTR Pro Tennis Series - Ricany | 2021/09/06 12:00 | Andrey Chepelev v Lawrence Bataljin | 6-1,6-3 |
| UTR Pro Tennis Series - Portoroz | 2021/08/21 11:00 | Lawrence Bataljin v Tilen Zitnik | 6-3,4-6,4-5 |
| UTR Pro Tennis Series - Portoroz | 2021/08/20 11:00 | Olexiy Kolisnyk v Lawrence Bataljin | 6-3,6-2 |
| UTR Pro Tennis Series - Portoroz | 2021/08/19 08:00 | George Botezan v Lawrence Bataljin | 6-4,2-6,2-5 |
| UTR Pro Tennis Series - Portoroz | 2021/08/18 08:00 | Teodor Ureche v Lawrence Bataljin | 5-7,1-6 |
| UTR Pro Tennis Series - Portoroz | 2021/08/16 09:30 | Grgo Dujmovic v Lawrence Bataljin | 4-6,7-5,1-6 |
| ITF - M15 - Xativa | 2021/08/01 13:00 | Lawrence Bataljin v Grigoriy Korobeynikov | 7-5,2-6,8-10 |
| ITF - M25 - Gandia | 2021/07/19 10:00 | Lawrence Bataljin v Juan P Canas Garcia | 4-6,3-6 |