Kai Lemstra defeated Christopher Patzanovsky 6-2 6-4 in the M15 Heraklion 6 q16 on hard. The upset overturned the form book — Christopher Patzanovsky came in leading the head-to-head 1–0. Kai Lemstra claimed a first win over Christopher Patzanovsky in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-10-08 | M15 Bad Salzdetfurth 1 | Q16 | carpet | Christopher Patzanovsky | 7-6(5) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.