Constantin Frantzen defeated Milan Welte 6-4 3-6 10-5 in the M25 Marburg 1 q16 on clay. The upset overturned the form book — Milan Welte came in leading the head-to-head 1–0. Constantin Frantzen claimed a first win over Milan Welte in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2022-07-07 | M25 Marburg 1 | R16 | clay | Milan Welte | 3-6 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.