Denys Klok defeated Gabriel Donev 7-6 7-5 in the M15 Pazardzhik 1 quarter-final on clay. Denys Klok extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-10-03 | M25 Pazardzhik 2 | R32 | clay | Gabriel Donev | 6-0 6-0 |
| 2023-07-04 | M15 Sofia 1 | R32 | clay | Denys Klok | 7-5 6-1 |
Averages over each player's completed matches in the selected window (16 vs 1). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About