| Exo Tennis Germany Series | 2020/07/22 10:10 | Schmitz, Constantin v Djonov, Christian | 7-6,7-5 |
| Exo Tennis Germany Series | 2020/07/21 09:50 | Hazem Naw v Djonov, Christian | 6-1,7-5 |
| Exo Tennis Germany Series | 2020/07/22 11:55 | Benjamin Hassan v Haerteis, Johannes | 5-7,6-7 |
| Exo Tennis Germany Series | 2020/07/21 11:35 | Haerteis, Johannes v Gelhardt, Luca | 6-1,6-3 |
| DTB German Pro Series | 2020/06/26 12:00 | Max Hans Rehberg v Haerteis, Johannes | 3-6,2-6 |
| DTB German Pro Series | 2020/06/25 13:35 | Daniel Masur v Haerteis, Johannes | 6-7,6-1,5-7 |
| DTB German Pro Series | 2020/06/24 14:10 | Haerteis, Johannes v Max Hans Rehberg | 3-6,2-6 |
| DTB German Pro Series | 2020/06/23 12:00 | Stebe, Cedrik-Marcel v Haerteis, Johannes | 6-4,6-3 |
| DTB German Pro Series | 2020/06/14 13:40 | Haerteis, Johannes v Torebko, Peter | 3-6,3-6 |
| DTB German Pro Series | 2020/06/13 15:30 | Haerteis, Johannes v Sebastian Fanselow | 6-4,6-4 |