Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 Frankfurt am Main | 2021/08/10 08:25 | Hampel, Lenny v Adrian Oetzbach | 2-6,6-0,2-10 |
| ITF M25 Frankfurt am Main | 2021/08/09 09:00 | Hampel, Lenny v Neil Oberleitner | 6-4,6-4 |
| ITF M25 Wetzlar | 2021/08/05 09:00 | Hampel, Lenny v Alexey Vatutin | 2-6,2-6 |
| ITF M25 Wetzlar | 2021/08/04 13:10 | Hampel, Lenny v Torski, Osman | 6-4,7-5 |
| ITF M25 Kottingbrunn | 2021/07/24 10:00 | Francisco Comesana v Hampel, Lenny | 6-3,7-5 |
| ITF M25 Kottingbrunn | 2021/07/23 08:30 | Apostol, Bogdan Ionut v Hampel, Lenny | 1-6,6-4,5-7 |
| ITF M25 Kottingbrunn | 2021/07/22 09:40 | Hampel, Lenny v David Pichler | 7-6,6-2 |
| ITF M25 Kottingbrunn | 2021/07/21 08:00 | Manda, Calin v Hampel, Lenny | 4-6,5-7 |
| ITF M15 Bad Waltersdorf | 2021/08/31 07:00 | Matic Dimic v Christian Fellin | 6-1,6-1 |
| ITF M15 Bad Waltersdorf | 2021/08/30 09:00 | Hubner, Edward v Matic Dimic | 3-6,3-6 |
| ITF M15 Bad Waltersdorf | 2021/08/29 09:00 | Bezjak, Gasper v Matic Dimic | 4-6,4-6 |
| ITF M15 Bad Waltersdorf | 2021/08/22 07:00 | Luigi Sorrentino v Matic Dimic | 4-6,7-6,10-8 |
| ITF M15 Warmbad-Villach | 2021/08/16 16:00 | Matic Dimic v Mario G Fernandez | 5-7,3-6 |
| ITF M15 Novi Sad | 2021/08/01 07:00 | Koray Kirci v Matic Dimic | 7-6,6-4 |
| ITF M15 Novi Sad | 2021/07/27 09:40 | Matic Dimic v Lazar Milicevic | 7-6,2-6,8-10 |
| ITF M15 Novi Sad | 2021/07/26 09:00 | Matic Dimic v Stevan Popovic | 2-6,6-3,10-7 |