Constantin Schmitz defeated Dominik Boehler 6-1 4-6 6-2 in the M15 Trier 1 semi-final on clay. The result followed the form book — Constantin Schmitz came in leading the head-to-head 1–0. Constantin Schmitz extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-02-06 | M15 Kaarst 1 | R32 | carpet | Constantin Schmitz | 6-3 3-1 |