Denys Klok defeated Vladimir Korolev 6-2 6-1 in the M15 Eupen 1 round of 32 on clay. The result followed the form book — Denys Klok came in leading the head-to-head 1–0. Denys Klok extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-04-27 | M15 Antalya 17 | Q16 | clay | Denys Klok | 6-1 4-6 10-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.