Stadium: Center Court Round: 28 Ground: Clay
| ITF Germany F9 | 2018/07/25 16:00 | Dominik Boehler v Constantin Schmitz | 6-1,6-3 |
| ITF M15 Brussels | 2019/08/02 13:15 | Christopher Heyman v Dominik Boehler | 7-6,6-4 |
| ITF M15 Brussels | 2019/08/01 08:00 | Maciej Smola v Dominik Boehler | 1-6,1-6 |
| ITF M15 Brussels | 2019/07/31 12:00 | Alexis Boureau v Dominik Boehler | 6-7,6-2,2-6 |
| ITF M15 Bad Schussenried | 2019/07/25 12:00 | Dominik Boehler v Marvin Netuschil | 4-6,0-6 |
| ITF M15 Bad Schussenried | 2019/07/23 14:25 | Dominik Boehler v Tim Handel | 3-6,6-2,6-4 |
| ITF M15 Telfs | 2019/07/11 09:30 | Dominik Boehler v Petr Nouza | 6-7,4-6 |
| ITF M15 Telfs | 2019/07/10 09:30 | Pavel Nejedly v Dominik Boehler | 0-6,2-6 |
| ITF M15 Saarlouis | 2019/07/06 14:00 | Nick Hardt v Dominik Boehler | 6-4,6-3 |
| ITF M15 Bad Schussenried | 2019/07/23 08:30 | Henri Squire v Constantin Schmitz | 7-5,6-3 |
| ITF M25 Karlsruhe | 2019/06/03 09:00 | Adrian Oetzbach v Constantin Schmitz | 6-4,7-5 |
| ITF M15 Tabarka | 2019/05/17 09:00 | Mohamed Aziz Dougaz v Constantin Schmitz | 7-6,6-1 |
| ITF M15 Tabarka | 2019/05/16 12:45 | Alessandro Ingarao v Constantin Schmitz | 2-6,1-6 |
| ITF M15 Tabarka | 2019/05/15 08:00 | Hugo Schott v Constantin Schmitz | 1-6,4-6 |
| ITF M15 Troisdorf | 2019/05/10 10:00 | Constantin Schmitz v Kacper Zuk | 4-6,2-6 |
| ITF M15 Troisdorf | 2019/05/09 11:20 | Daniel De Jonge v Constantin Schmitz | 3-6,1-6 |
| ITF M15 Troisdorf | 2019/05/09 08:00 | Kai Wehnelt v Constantin Schmitz | 2-6,2-6 |