Denys Klok defeated Yan Sabanin 7-5 7-6 in the M25 Karlsruhe 1 q32 on clay. The upset overturned the form book — Yan Sabanin came in leading the head-to-head 1–0. Denys Klok claimed a first win over Yan Sabanin in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-02-19 | Kazakhstan F2 | R32 | hard | Yan Sabanin | 6-2 5-7 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.