Stadium: Court 3 Round: 25 Ground: Carpet indoor
| Challenger Campinas | 2019/10/01 16:20 | Nicolas Alvarez v Jeremy Jahn | 6-4,6-2 |
| Challenger Biella | 2019/09/18 11:15 | Alejandro Davidovich Fokina v Jeremy Jahn | 7-5,7-5 |
| Challenger Biella | 2019/09/16 14:10 | Jeremy Jahn v Enrico Dalla Valle | 6-3,6-4 |
| Challenger Szczecin | 2019/09/13 12:00 | Albert Ramos-Vinolas v Jeremy Jahn | 7-6,6-2 |
| Challenger Szczecin | 2019/09/12 12:45 | Jeremy Jahn v Gianluca Mager | 6-1,2-6,6-4 |
| Challenger Szczecin | 2019/09/11 08:00 | Rudolf Molleker v Jeremy Jahn | 4-6,3-6 |
| Challenger Szczecin | 2019/09/10 14:00 | Vit Kopriva v Jeremy Jahn | 5-7,4-6 |
| ITF M25 La Marsa | 2019/09/06 10:00 | Bruno Santanna v Jeremy Jahn | 6-1,6-2 |
| ITF M15 Heraklion | 2019/11/17 08:30 | Alexander Erler v Jan Zielinski | 7-5,6-1 |
| ITF M15 Heraklion | 2019/11/16 12:00 | Yshai Oliel v Alexander Erler | 4-6,6-2,1-6 |
| ITF M15 Heraklion | 2019/11/16 08:00 | Alexander Erler v Nikita Mashtakov | 6-1,3-6,6-3 |
| ITF M15 Heraklion | 2019/11/15 08:00 | Alexander Erler v Billy Harris | 6-3,3-6,6-4 |
| ITF M15 Heraklion | 2019/11/12 08:30 | Alexander Erler v Toby Martin | 6-3,3-6,6-3 |
| ITF M15 Heraklion | 2019/11/08 08:00 | Alexander Erler v Yshai Oliel | 2-6,3-6 |
| ITF M15 Heraklion | 2019/11/07 09:00 | Alexander Erler v Lenny Hampel | 6-3,6-4 |
| ITF M15 Heraklion | 2019/11/05 08:30 | Alexander Erler v Michael Zhu | 6-3,2-6,6-2 |