Stadium: Court 4 Round: 54 Ground: Clay
| 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 M25 Telfs | 2021/07/14 07:55 | Filip Misolic v Hampel, Lenny | 6-4,6-7,6-4 |
| ITF M25 Frankfurt am Main | 2021/08/09 09:00 | Adrian Oetzbach v Oscar Moraing | 6-4,3-6,10-6 |
| ITF M15 Frederiksberg | 2021/08/04 12:05 | Jonathan Mridha v Adrian Oetzbach | 6-2,6-3 |
| ITF M15 Frederiksberg | 2021/08/02 10:20 | Adrian Oetzbach v Overbeck, Carl Emil | 6-3,1-6,10-4 |
| ITF M15 Vejle | 2021/07/27 12:20 | Adrian Oetzbach v Kirkov, Vasil | 7-5,3-6,3-6 |
| ITF M15 Vejle | 2021/07/26 08:00 | Adrian Oetzbach v Iiro Vasa | 6-3,7-5 |
| ITF M15 Esch/Alzette | 2021/07/19 08:55 | Marlon Vankan v Adrian Oetzbach | 6-3,6-7,10-6 |
| ITF M15 Esch/Alzette | 2021/07/18 09:45 | Bhullard, Rana-Roop Singh v Adrian Oetzbach | 3-6,2-6 |
| ITF - M15 Monastir | 2020/12/09 10:00 | Eliakim Coulibaly v Adrian Oetzbach | 6-2,6-4 |