Stadion: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 - Bad Waltersdorf | 2021/08/30 07:00 | Matic Spec v Jonas Greif | 6-0,6-1 |
| ITF - M15 - Warmbad-Villach | 2021/08/15 07:00 | Jonas Greif v Gabriel Decamps | 0-6,2-6 |
| ITF - M25 - Bozen | 2021/08/03 15:35 | Petros Tsitsipas v Jonas Greif | 6-3,6-2 |
| ITF - M15 - Monastir | 2021/04/18 10:00 | Leyton Rivera v Jonas Greif | 6-1,6-2 |
| ITF - M15 - Monastir | 2021/04/11 08:00 | Jonas Greif v Yuta Kawahashi | 2-6,3-6 |
| ITF - M15 - Monastir | 2021/03/07 08:00 | Jonas Greif v Luca Castagnola | 2-6,0-6 |
| ITF - M15 - Monastir | 2021/02/28 09:00 | Jonas Greif v Leonardo Civita-Telles | 0-6,5-7 |
| ITF - M15 - Monastir | 2021/02/22 08:00 | Jonas Greif v Kenneth Raisma | 2-6,2-6 |
| ITF - M15 - Monastir | 2021/10/11 08:00 | Egor Tsarapkin v Rishabdev Raman | 6-2,7-5 |
| ITF - M15 - Monastir | 2021/10/04 09:00 | Rishabdev Raman v Nikita Volonski | 1-6,2-6 |
| ITF - M15 - Monastir | 2021/10/03 09:00 | Rishabdev Raman v Ankit Chopra | 6-4,7-5 |
| ITF - M15 - Monastir | 2021/09/20 08:00 | Josef Southcombe v Rishabdev Raman | 4-6,6-4,10-8 |
| ITF - M15 - Monastir | 2021/09/19 09:00 | Rishabdev Raman v Adam Nagoudi | 6-1,2-6,12-10 |
| ITF - M15 - Monastir | 2021/09/13 12:00 | Rishabdev Raman v Amaury Raynel | 2-6,3-6 |
| ITF - M15 - Monastir | 2021/09/05 12:30 | Blake Ellis v Rishabdev Raman | 6-1,6-2 |
| ITF - M15 - Monastir | 2021/08/30 13:00 | Blake Ellis v Rishabdev Raman | 6-3,6-1 |