Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 Kamen | 2019/06/25 15:30 | Erler, Alexander v Slobodchikov, Ronald | 4-6,6-7 |
| Balatonalmadi, Singles Qualifying M-ITF-HUN-02A | 2019/06/19 09:55 | Fabian Marozsan v Erler, Alexander | 6-2,6-2 |
| Kaltenkirchen, Singles Qualifying M-ITF-GER-05A | 2019/06/13 11:10 | Eriksson, Markus v Erler, Alexander | 6-0,6-7,6-4 |
| Kaltenkirchen, Singles Qualifying M-ITF-GER-05A | 2019/06/12 11:00 | Erler, Alexander v Michael Vrbensky | 6-2,6-2 |
| Kaltenkirchen, Singles Qualifying M-ITF-GER-05A | 2019/06/11 08:00 | Erler, Alexander v von Massow, George | 6-4,7-6 |
| ITF - M15 Kalmar | 2019/05/14 12:10 | Erler, Alexander v Ivanov, Vladimir | 1-6,6-2,6-7 |
| ATP - Munich | 2019/04/27 14:00 | Gunneswaran, Prajnesh v Erler, Alexander | 3-6,7-6,7-5 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/03/26 12:15 | Pedro Vives Marcos v Erler, Alexander | 7-5,6-2 |
| Kaltenkirchen, Singles Qualifying M-ITF-GER-05A | 2019/06/12 10:30 | Eriksson, Markus v Guttau, Niklas | 6-3,6-1 |
| Kaltenkirchen, Singles Qualifying M-ITF-GER-05A | 2019/06/11 18:25 | Guttau, Niklas v Rinky Hijikata | 6-3,6-1 |
| ITF - M15 Antalya | 2019/05/25 07:45 | Guttau, Niklas v Heyman, Christopher | 5-7,2-6 |
| ITF - M15 Antalya | 2019/05/23 09:05 | Guttau, Niklas v Obert, Adrian | 4-6,6-4,7-6 |
| ITF - M15 Antalya | 2019/05/22 11:30 | Paul Woerner v Guttau, Niklas | 1-6,2-6 |
| ITF - M15 Antalya | 2019/04/25 10:40 | Heyman, Christopher v Guttau, Niklas | 7-6,7-5 |
| ITF - M15 Antalya | 2019/04/24 10:10 | Gorazd Srbljak v Guttau, Niklas | 1-6,5-7 |
| ITF - M15 Antalya | 2019/04/23 07:00 | Guttau, Niklas v Michalis Sakellaridis | 6-1,6-1 |