| Austrian Pro Series Singles | 2020/06/01 08:00 | Erler, Alexander v Weissborn, Tristan | 6-4,7-6 |
| Austrian Pro Series Singles | 2020/05/30 11:20 | Dennis Novak v Erler, Alexander | 7-6,5-7,6-2 |
| ITF - M15 Héraklion | 2020/03/06 08:30 | Erler, Alexander v Lebedev, Alexander | 3-6,3-6 |
| ITF - M15 Héraklion | 2020/03/05 10:20 | Erler, Alexander v Ioannis Xilas | 7-6,6-4 |
| ITF - M15 Héraklion | 2020/03/04 08:30 | Erler, Alexander v Sean Hodkin | 6-2,6-1 |
| ITF - M25 Trente | 2020/03/01 09:25 | Bemelmans, Ruben v Erler, Alexander | 4-6,6-2,6-4 |
| ITF - M25 Trente | 2020/02/29 12:00 | Ocleppo, Julian v Erler, Alexander | 4-6,2-6 |
| ITF - M25 Trente | 2020/02/28 11:55 | Raul Brancaccio v Erler, Alexander | 1-6,7-6,1-6 |
| Austrian Pro Series Singles | 2020/06/01 11:55 | Dennis Novak v Lukas Neumayer | 6-1,3-6,6-4 |
| Austrian Pro Series Singles | 2020/05/29 09:30 | Weissborn, Tristan v Lukas Neumayer | 6-7,6-7 |
| ITF - M15 Monastir | 2020/03/11 15:30 | Savva Polukhin v Lukas Neumayer | 6-3,7-5 |