Stadium: Center Court Round: 24 Ground: Clay
| ITF Germany F13 | 2014/08/21 11:10 | Sandro Ehrat v Johannes Haerteis | 1-6,6-3,6-4 |
| Challenger Prostejov | 2019/06/03 12:20 | Arthur De Greef v Johannes Haerteis | 4-6,4-6 |
| Challenger Prostejov | 2019/06/02 14:40 | Benjamin Lock v Johannes Haerteis | 6-2,2-6,3-6 |
| Challenger Jerusalem | 2019/05/20 07:00 | Johannes Haerteis v Gonzalo Escobar | 3-6,7-5,2-6 |
| Challenger Rome | 2019/05/07 12:10 | Johannes Haerteis v Stefano Napolitano | 2-6,3-6 |
| Challenger Rome | 2019/05/06 10:00 | Skander Mansouri v Johannes Haerteis | 6-7,7-6,5-7 |
| Challenger Savannah | 2019/04/30 14:00 | Cannon Kingsley v Johannes Haerteis | 6-2,6-2 |
| Challenger Tallahassee | 2019/04/24 14:00 | Mitchell Krueger v Johannes Haerteis | 3-6,6-4,6-1 |
| Challenger Tallahassee | 2019/04/23 16:40 | Johannes Haerteis v Evan Song | 6-4,6-4 |
| Challenger Prostejov | 2019/06/05 09:30 | Bernabe Zapata Miralles v Sandro Ehrat | 6-1,7-6 |
| Challenger Prostejov | 2019/06/04 13:35 | Sandro Ehrat v Jiri Vesely | 3-6,6-3,6-4 |
| Challenger Prostejov | 2019/06/02 10:00 | Dragos Dima v Sandro Ehrat | 6-3,3-6,5-7 |
| Challenger Lisbon | 2019/05/17 12:00 | Sandro Ehrat v Lorenzo Giustino | 5-7,6-3,2-6 |
| Challenger Lisbon | 2019/05/16 11:55 | Steve Darcis v Sandro Ehrat | 2-6,4-6 |
| Challenger Lisbon | 2019/05/15 12:30 | Sandro Ehrat v Mitchell Krueger | 6-4,7-6 |
| Challenger Lisbon | 2019/05/13 10:45 | Sandro Ehrat v JC Aragone | 7-6,6-2 |
| Challenger Savannah | 2019/05/01 22:00 | Sandro Ehrat v Tommy Paul | 7-5,3-6,4-6 |