| ITF - M15 Monastir | 2020/10/18 13:00 | Hellfritsch, Lucas v Gabriel Roveri Sidney | 6-7,3-6 |
| ITF - M15 Monastir | 2020/10/14 07:55 | Hellfritsch, Lucas v Guido Ivan Justo | 2-6,3-6 |
| ITF - M15 Monastir | 2020/03/09 08:00 | Hellfritsch, Lucas v Savva Polukhin | 2-6,1-6 |
| ITF - M15 Oberhaching | 2020/02/16 10:30 | de Rossi, Marco v Hellfritsch, Lucas | 5-7,6-2,10-2 |
| ITF - M15 Sharm El Sheikh | 2019/11/24 08:00 | Hellfritsch, Lucas v Alexey Zakharov | 4-6,1-6 |
| ITF - M15 Sharm El Sheikh | 2019/11/23 08:00 | Hellfritsch, Lucas v Ryan Nijboer | 6-2,6-3 |
| ITF - M15 Sharm El Sheikh | 2019/11/22 08:00 | Hellfritsch, Lucas v Luca Potenza | 7-6,7-5 |
| ITF - M15 Sharm El Sheikh | 2019/11/21 08:00 | Sidane Pontjodikromo v Hellfritsch, Lucas | 5-7,6-2,2-6 |
| ITF M15 Forbach | 2020/09/28 12:30 | Jakob Schnaitter v Yannik Steinegger | 5-7,2-6 |
| ITF M15 Anif | 2020/08/23 07:00 | Botezan, George v Jakob Schnaitter | 6-4,6-4 |
| Claremont, Singles Qualifying M-ITF-USA-06B | 2019/10/11 18:00 | Liam Broady v Jakob Schnaitter | 6-2,6-4 |
| Claremont, Singles Qualifying M-ITF-USA-06B | 2019/10/10 18:00 | Jakob Schnaitter v Mark Whitehouse | 3-6,7-5,6-3 |
| Claremont, Singles Qualifying M-ITF-USA-06B | 2019/10/09 22:40 | Nava, Diego v Jakob Schnaitter | 6-0,4-6,6-7 |
| Claremont, Singles Qualifying M-ITF-USA-06B | 2019/10/08 17:00 | Jakob Schnaitter v Amiri, Farzin Danny | 6-4,6-2 |
| Claremont, Singles Qualifying M-ITF-USA-06B | 2019/10/07 18:00 | Jakob Schnaitter v Kyle Kang | 7-5,6-2 |
| Claremont, Singles Qualifying M-ITF-USA-06B | 2019/10/06 18:00 | Abraham Asaba v Jakob Schnaitter | 6-7,3-6 |