Stadium: Court 11 Round: 14 Ground: Clay
| Challenger - Prostějov | 2021/06/15 08:30 | Johannes Haerteis v Federico Coria | 1-6,0-6 |
| Challenger - Prostějov | 2021/06/14 08:30 | Johannes Haerteis v David Poljak | 5-7,3-6 |
| Challenger - Prostějov | 2021/06/13 09:00 | Johannes Haerteis v Jakub Nicod | 6-3,3-6,6-3 |
| Challenger - Bratislava | 2021/06/06 14:15 | Skander Mansouri v Johannes Haerteis | 6-3,7-5 |
| Challenger - Oeiras | 2021/05/25 14:00 | Johannes Haerteis v Filip Cristian Jianu | 3-6,0-6 |
| Challenger - Ortisei | 2020/11/19 10:00 | Johannes Haerteis v Ilya Ivashka | 6-7,3-6 |
| Challenger - Ortisei | 2020/11/17 09:00 | Daniel Masur v Johannes Haerteis | 3-6,7-6,3-6 |
| Challenger - Ortisei | 2020/11/15 10:00 | Alexey Vatutin v Johannes Haerteis | 3-6,6-3,3-6 |
| Majstrovstvá Nemecka | 2020/12/09 14:00 | Daniel Masur v Nino Ehrenschneider | 6-4,6-3 |
| Majstrovstvá Nemecka | 2020/12/08 09:30 | Nico Hornitschek v Nino Ehrenschneider | 6-4,3-6,2-6 |
| DTB German Pro Series | 2020/07/23 14:40 | Milan Welte v Nino Ehrenschneider | 6-4,6-7,2-6 |
| DTB German Pro Series | 2020/07/21 15:40 | Nino Ehrenschneider v Osman Torski | 6-2,6-4 |
| DTB German Pro Series | 2020/06/27 12:00 | Louis Wessels v Nino Ehrenschneider | 6-4,7-6 |
| DTB German Pro Series | 2020/06/26 13:40 | Yannick Maden v Nino Ehrenschneider | 6-3,6-1 |
| DTB German Pro Series | 2020/06/25 12:25 | Louis Wessels v Nino Ehrenschneider | 3-6,6-3,7-5 |
| DTB German Pro Series | 2020/06/24 12:40 | Oscar Otte v Nino Ehrenschneider | 6-2,6-2 |