David Hough defeated N. Schlagenhauf 6-4 6-3 in the M15 Antalya 31 q64 on clay. The upset overturned the form book — N. Schlagenhauf came in leading the head-to-head 1–0. David Hough claimed a first win over N. Schlagenhauf in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-10-24 | M15 Antalya 29 | Q64 | clay | N. Schlagenhauf | 2-6 6-1 10-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.