Stadium: Center Court Oberhaching Round: 1
| 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 |
| DTB German Pro Series | 2020/06/12 14:45 | Haerteis, Johannes v Christoph Negritu | 7-6,3-6,6-2 |
| DTB German Pro Series | 2020/06/11 14:35 | Haerteis, Johannes v Mika Lipp | 6-0,6-0 |
| Exo Tennis Germany Series | 2020/05/31 09:35 | Gelhardt, Luca v Haerteis, Johannes | 2-6,2-6 |
| Exo Tennis Germany Series | 2020/05/30 10:15 | Jan Choinski v Haerteis, Johannes | 4-6,1-6 |
| Exo Tennis Germany Series | 2020/05/29 09:30 | Schmitz, Constantin v Haerteis, Johannes | 3-6,7-6,6-2 |
| DTB German Pro Series | 2020/06/23 13:50 | Daniel Masur v Max Hans Rehberg | 6-2,7-6 |
| DTB German Pro Series | 2020/06/12 12:10 | Krawietz, Kevin v Max Hans Rehberg | 5-7,6-4,6-7 |
| DTB German Pro Series | 2020/06/11 09:30 | Max Hans Rehberg v Simon, Tobias | 3-6,7-6,6-3 |
| DTB German Pro Series | 2020/06/10 09:45 | Bachinger, Matthias v Max Hans Rehberg | 2-6,4-6 |
| DTB German Pro Series | 2020/06/09 14:55 | Yannick Hanfmann v Max Hans Rehberg | 6-2,6-0 |
| ITF - M15 Oberhaching | 2020/02/18 16:55 | Satral, Jan v Max Hans Rehberg | 6-2,6-3 |
| ITF Germany F14 | 2018/09/30 11:30 | Max Hans Rehberg v Walterscheid-Tukic, Nikolas | 6-2,1-6,4-6 |