Stadium: Court 4 Round: 25 Ground: Hardcourt indoor
| ITF - M25 Saint-Dizier | 2021/11/04 11:00 | Tristan Schoolkate v Jahn, Jeremy | 6-3,6-2 |
| ITF - M25 Saint-Dizier | 2021/11/03 13:20 | Petros Tsitsipas v Jahn, Jeremy | 4-6,7-6,6-7 |
| ITF M25 Hamburg | 2021/10/20 08:00 | Louis Wessels v Jahn, Jeremy | 6-1,7-6 |
| ITF M25 Ueberlingen | 2021/08/18 10:10 | Jahn, Jeremy v Cozbinov, Alexander | 3-6,7-6,1-6 |
| ITF M25 Bolzano | 2021/08/03 13:50 | Andrea Gola v Jahn, Jeremy | 4-6,6-2,6-3 |
| ITF M25 Denia | 2021/07/27 17:25 | Carlos Lopez Montagud v Jahn, Jeremy | 6-4,6-2 |
| ITF M25 Gandia | 2021/07/21 16:00 | Mas de Ugarte, Jordi v Jahn, Jeremy | 6-4,6-3 |
| Challenger Amersfoort | 2021/07/12 09:00 | Jahn, Jeremy v Johan Nikles | 2-6,3-6 |
| ITF - M25 Saint-Dizier | 2021/11/01 11:00 | Buvaysar Gadamauri v Raphael Calzi | 3-6,6-3,6-10 |
| ITF M25 Hamburg | 2021/10/19 08:00 | Buvaysar Gadamauri v Viktor Durasovic | 2-6,4-6 |
| ITF M25 Hamburg | 2021/10/17 15:55 | Buvaysar Gadamauri v Hendrik Jebens | 6-4,6-3 |
| ITF M25 Hamburg | 2021/10/17 09:30 | Buvaysar Gadamauri v Alessio Vasquez Gehrke | 6-2,6-2 |
| ITF M25 Budapest | 2021/10/01 08:30 | Pawel Juszczak v Buvaysar Gadamauri | 6-0,6-0 |
| ITF M25 Budapest | 2021/09/29 11:45 | Buvaysar Gadamauri v Hampel, Lenny | 6-2,6-4 |
| ITF M25 Budapest | 2021/09/28 09:40 | Buvaysar Gadamauri v Patzanovsky, Christopher | 6-1,6-2 |
| ITF M25 Budapest | 2021/09/27 12:35 | Buvaysar Gadamauri v Marcell Bartakovics | 6-2,3-6,12-10 |