| Challenger Columbus | 2020/02/25 15:00 | Alexander Brown v Johannes Haerteis | 3-6,6-7 |
| Challenger Drummondville | 2020/02/22 17:00 | Maxime Cressy v Johannes Haerteis | 7-6,6-4 |
| Challenger Drummondville | 2020/02/21 17:40 | Roberto Cid Subervi v Johannes Haerteis | 6-1,4-6,1-6 |
| Challenger Drummondville | 2020/02/20 17:45 | Johannes Haerteis v Patrik Niklas-Salminen | 7-6,5-7,7-5 |
| Challenger Drummondville | 2020/02/18 23:05 | Goncalo Oliveira v Johannes Haerteis | 6-7,1-6 |
| Challenger Drummondville | 2020/02/17 17:45 | Johannes Haerteis v Tony Bourcet | 6-2,6-0 |
| ITF M25 Nussloch | 2020/01/24 19:00 | Johannes Haerteis v Ruben Bemelmans | 4-6,3-6 |
| ITF M25 Nussloch | 2020/01/23 10:55 | Giulio Zeppieri v Johannes Haerteis | 6-3,3-6,6-7 |
| ITF M15 Lambermont | 2019/08/23 13:30 | Mathieu Perchicot v Constantin Schmitz | 6-2,6-1 |
| ITF M15 Lambermont | 2019/08/22 11:45 | Nicolas Uryson v Constantin Schmitz | 3-6,0-6 |
| ITF M15 Lambermont | 2019/08/21 13:20 | Tom Pisane v Constantin Schmitz | 4-6,3-6 |
| ITF M15 Trier | 2019/08/17 09:00 | Adrian Obert v Constantin Schmitz | 6-4,6-3 |
| ITF M15 Trier | 2019/08/16 12:00 | Dominik Boehler v Constantin Schmitz | 1-6,6-4,2-6 |
| ITF M15 Trier | 2019/08/15 12:00 | Constantin Schmitz v Niklas Schell | 6-3,6-4 |
| ITF M15 Trier | 2019/08/14 10:00 | Constantin Schmitz v Hasan Ibrahim | 6-3,6-2 |
| ITF M15 Trier | 2019/08/13 11:05 | Constantin Schmitz v Tim Handel | 6-1,6-2 |