Stadium: Court 06 Round: 62 Ground: Clay
| ITF M15 Novi Sad | 2021/08/01 10:45 | Michalis Sakellaridis v Aleksa Mardjonovic | 2-6,2-6 |
| ITF M15 Novi Sad | 2021/07/25 09:30 | Nemanja Malesevic v Michalis Sakellaridis | 2-6,6-4,10-3 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Toby Martin v Michalis Sakellaridis | 6-1,6-2 |
| UTR Pro Tennis Series Beograd | 2021/07/11 10:00 | Michalis Sakellaridis v Stefan Latinov | 1-6,2-6 |
| UTR Pro Tennis Series Beograd | 2021/07/10 13:00 | Michalis Sakellaridis v Aleksei Khomich | 6-4,0-0 |
| UTR Pro Tennis Series Beograd | 2021/07/09 07:30 | Dusan Obradovic v Michalis Sakellaridis | 6-4,5-4 |
| UTR Pro Tennis Series Beograd | 2021/07/08 09:00 | Constant De La Bassetiere v Michalis Sakellaridis | 6-2,5-4 |
| UTR Pro Tennis Series Beograd | 2021/07/06 14:00 | Nikola Slavic v Michalis Sakellaridis | 6-3,6-6 |
| ITF M15 Gdynia | 2021/08/08 08:00 | Francisco Vittar v Gianni Ross | 2-6,6-0,7-10 |
| ITF M15 Xativa | 2021/08/02 07:00 | Francisco Vittar v Max Alcala Gurri | 2-6,2-6 |
| ITF M15 Xativa | 2021/08/01 10:00 | Francisco Vittar v Areg Stepanian | 6-1,6-0 |
| ITF M25 Kottingbrunn | 2021/07/20 10:40 | Peter Goldsteiner v Francisco Vittar | 6-3,6-1 |
| ITF M25 Kottingbrunn | 2021/07/19 13:45 | Jan Jermar v Francisco Vittar | 4-6,5-7 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Tomas Lanik v Francisco Vittar | 4-6,2-6 |
| ITF M25 Telfs | 2021/07/14 08:50 | Francisco Vittar v Sandro Kopp | 2-6,3-6 |
| ITF M25 Telfs | 2021/07/13 09:10 | Tim Heger v Francisco Vittar | 5-7,6-3,7-10 |