Stadium: Central Hard Court Round: 26 Ground: Hardcourt outdoor
| ITF Austria F1 | 2017/07/05 12:00 | Lenny Hampel v Alexander Erler | 4-6,6-4,6-3 |
| ITF - M15 Heraklion | 2019/11/05 08:30 | Alexander Erler v Michael Zhu | 6-3,2-6,6-2 |
| ATP - Wenen | 2019/10/19 09:00 | Cameron Norrie v Alexander Erler | 6-4,6-2 |
| ITF M25 Norman | 2019/10/02 16:20 | Alexander Cozbinov v Alexander Erler | 7-6,3-6,6-4 |
| ITF M25 - Harlingen | 2019/09/26 01:40 | Alexander Erler v Logan Smith | 1-6,3-6 |
| ITF M25 - Harlingen | 2019/09/25 18:30 | Alexander Erler v Logan Smith | 1-6,3-5 |
| Challenger Columbus 3 | 2019/09/18 18:50 | Alexander Erler v Mikael Torpegaard | 2-6,7-6,1-6 |
| Challenger Columbus 3 | 2019/09/17 15:40 | Colin Sinclair v Alexander Erler | 5-7,6-7 |
| Challenger - Banja Luka | 2019/09/10 08:00 | Camilo Ugo Carabelli v Alexander Erler | 6-4,3-6,6-3 |
| ITF - M15 Heraklion | 2019/11/06 12:55 | Simon A Ivanov v Lenny Hampel | 6-7,0-6 |
| ITF M15 - Caïro | 2019/09/27 08:00 | Simone Roncalli v Lenny Hampel | 6-2,6-4 |
| ITF M15 - Caïro | 2019/09/26 08:00 | Lenny Hampel v Alexander Weis | 7-5,6-4 |
| ITF M15 - Caïro | 2019/09/25 08:00 | Lenny Hampel v Daniil Nabatchikov | 6-0,6-0 |
| ITF M15 - Caïro | 2019/09/20 10:10 | Mathieu Perchicot v Lenny Hampel | 6-4,6-7,6-2 |
| ITF M15 - Caïro | 2019/09/18 13:55 | Sherif Makhlouf v Lenny Hampel | 4-6,6-7 |
| ITF M15 - Caïro | 2019/09/14 08:00 | Dimitriy Voronin v Lenny Hampel | 7-6,6-2 |
| ITF M15 - Caïro | 2019/09/13 08:00 | Stefano Battaglino v Lenny Hampel | 2-6,3-6 |