Christopher Patzanovsky defeated Kai Lemstra 7-6 6-4 in the M15 Bad Salzdetfurth 1 q16 on carpet. The upset overturned the form book — Kai Lemstra came in leading the head-to-head 1–0. Christopher Patzanovsky claimed a first win over Kai Lemstra in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-11-09 | M15 Heraklion 6 | Q16 | hard | Kai Lemstra | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.