| ITF M15 Heraklion | 2019/11/07 09:00 | Alexander Erler v Lenny Hampel | 6-3,6-4 |
| ITF Austria F1 | 2017/07/05 12:00 | Lenny Hampel v Alexander Erler | 4-6,6-4,6-3 |
| Austrian Pro Series | 2020/06/07 09:30 | Dominic Thiem v Lenny Hampel | 6-3,6-0 |
| Austrian Pro Series | 2020/06/04 08:20 | Jurij Rodionov v Lenny Hampel | 5-7,1-6 |
| Austrian Pro Series | 2020/06/02 17:00 | David Pichler v Lenny Hampel | 7-6,6-2 |
| Austrian Pro Series | 2020/05/29 12:00 | Jurgen Melzer v Lenny Hampel | 6-1,6-7,6-4 |
| Austrian Pro Series | 2020/05/28 07:00 | Jurij Rodionov v Lenny Hampel | 7-6,0-6,6-4 |
| Austrian Pro Series | 2020/05/27 09:00 | Lenny Hampel v Marko Andrejic | 6-2,6-1 |
| ITF M15 Heraklion | 2020/03/12 10:20 | Lenny Hampel v Clement Geens | 2-6,6-0,4-6 |
| ITF M15 Heraklion | 2020/03/11 13:15 | Pietro Marino v Lenny Hampel | 3-6,7-5,3-6 |
| Austrian Pro Series | 2020/06/06 17:25 | Philipp Oswald v Alexander Erler | 7-6,6-4 |
| Austrian Pro Series | 2020/06/05 16:05 | Sebastian Ofner v Alexander Erler | 6-3,6-2 |
| Austrian Pro Series | 2020/06/04 15:05 | Maximilian Neuchrist v Alexander Erler | 4-6,5-7 |
| Austrian Pro Series | 2020/06/02 07:00 | Alexander Erler v Lukas Neumayer | 6-4,6-2 |
| Austrian Pro Series | 2020/06/01 08:00 | Alexander Erler v Tristan-Samuel Weissborn | 6-4,7-6 |
| Austrian Pro Series | 2020/05/30 11:20 | Dennis Novak v Alexander Erler | 7-6,5-7,6-2 |
| ITF M15 Heraklion | 2020/03/06 08:30 | Alexander Erler v Alexander Lebedev | 3-6,3-6 |
| ITF M15 Heraklion | 2020/03/05 10:20 | Alexander Erler v Ioannis Xilas | 7-6,6-4 |