Stadium: Staerk Court Round: 26 Ground: Clay
| Karlsruhe, Singles M-ITF-GER-04A | 2019/06/05 13:40 | Jahn, Jeremy v Frawley, James | 6-2,3-6,7-6 |
| ITF M15 Quinta Do Lago | 2019/03/20 15:55 | Binding, Jonathan v Jahn, Jeremy | 2-6,1-6 |
| Kazan, Simples M-ITF-RUS-02A | 2019/03/14 08:35 | Jahn, Jeremy v Patael, Ben | 6-7,5-7 |
| Kazan, Simples M-ITF-RUS-02A | 2019/03/13 08:30 | Jahn, Jeremy v Lozan, Kristian | 6-1,6-3 |
| Kazan, Simples M-ITF-RUS-02A | 2019/03/13 07:00 | Jahn, Jeremy v Lozan, Kristian | 6-1,6-3 |
| ITF - M25 Trente | 2019/03/03 09:30 | Jahn, Jeremy v Jannik Sinner | 3-6,4-6 |
| ITF - M25 Trente | 2019/03/02 13:00 | Lenz, Julian v Jahn, Jeremy | 6-7,3-6 |
| ITF - M25 Trente | 2019/03/01 12:30 | Dubrivnyy, Artem v Jahn, Jeremy | 0-6,3-6 |
| Karlsruhe, Singles M-ITF-GER-04A | 2019/06/05 11:10 | Adrian Oetzbach v Sinclair, Colin | 6-3,3-6,4-6 |
| ITF M25 Most | 2019/06/01 08:00 | Sinclair, Colin v Satral, Jan | 6-3,2-6,3-6 |
| ITF M25 Most | 2019/05/31 08:00 | Sinclair, Colin v Krstev, Ondrej | 6-2,6-3 |
| ITF M25 Most | 2019/05/30 08:00 | Sinclair, Colin v Lucas Gerch | 6-2,5-7,6-3 |
| ITF M25 Most | 2019/05/29 10:05 | Sinclair, Colin v Jiri Lehecka | 6-3,6-2 |
| ITF M25 Jablonec Nad Nisou | 2019/05/23 12:15 | Lukas Klein v Sinclair, Colin | 6-3,6-3 |
| ITF M25 Jablonec Nad Nisou | 2019/05/23 08:00 | Sinclair, Colin v Netuschil, Marvin | 6-3,7-6 |
| ITF M15 Prague | 2019/05/14 08:00 | Paroulek, Tadeas v Sinclair, Colin | 6-3,6-2 |