| ITF - M25 Sunderland | 2020/02/26 13:00 | Jahn, Jeremy v Jonathan Mridha | 3-6,3-6 |
| Challenger Campinas | 2019/10/01 16:20 | Nicolas Alvarez v Jahn, Jeremy | 6-4,6-2 |
| Challenger Biella | 2019/09/18 11:15 | Alejandro Davidovich Fokina v Jahn, Jeremy | 7-5,7-5 |
| Challenger Biella | 2019/09/16 14:10 | Jahn, Jeremy v Enrico Dalla Valle | 6-3,6-4 |
| Challenger Szczecin | 2019/09/13 12:00 | Albert Ramos-Vinolas v Jahn, Jeremy | 7-6,6-2 |
| Challenger Szczecin | 2019/09/12 12:45 | Jahn, Jeremy v Gianluca Mager | 6-1,2-6,6-4 |
| Challenger Szczecin | 2019/09/11 08:00 | Rudolf Molleker v Jahn, Jeremy | 4-6,3-6 |
| Challenger Szczecin | 2019/09/10 14:00 | Vit Kopriva v Jahn, Jeremy | 5-7,4-6 |
| ITF M15 Loule | 2020/03/12 11:00 | Banes, Maverick v Marvin Moeller | 6-2,2-6,6-3 |
| ITF M15 Loule | 2020/03/11 10:30 | Yannik Steinegger v Marvin Moeller | 3-6,4-6 |
| ITF M15 Loule | 2020/03/09 15:45 | Marvin Moeller v Miranda Cisneros, Jose Joaquin | 6-2,6-2 |
| ITF M15 Loule | 2020/03/09 11:00 | Roglan, Albert v Marvin Moeller | 7-6,5-7,8-10 |
| ITF M15 Loule | 2020/03/08 10:00 | Sousa Severin, Guilherme v Marvin Moeller | 0-6,0-6 |
| ITF M15 Faro | 2020/03/02 15:30 | Marek, Wojciech v Marvin Moeller | 6-3,6-7,10-3 |
| ITF M15 Faro | 2020/03/02 10:00 | Marvin Moeller v Yannik Steinegger | 6-1,6-4 |
| ITF M15 Faro | 2020/03/01 13:00 | Marvin Moeller v Korobeynikov, Grigoriy | 6-2,6-2 |