Kirill Kivattsev defeated Kai Lemstra 6-1 7-6 in the M25 Nussloch 1 round of 32 on carpet. The upset overturned the form book — Kai Lemstra came in leading the head-to-head 1–0. Kirill Kivattsev claimed a first win over Kai Lemstra in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-08-24 | M15 Anif 1 | Q32 | clay | Kai Lemstra | 7-6(3) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.