Vasil Shandarov defeated Kaloyan Valchev 6-1 6-4 in the Bulgaria F1 round of 32 on clay. The upset overturned the form book — Kaloyan Valchev came in leading the head-to-head 1–0. Vasil Shandarov claimed a first win over Kaloyan Valchev in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-05-16 | Bulgaria F1 | Q16 | hard | Kaloyan Valchev | 7-5 2-6 7-5 |
Averages over each player's completed matches in the selected window (1 vs 3). ATP, WTA & Challenger.
wins 55% of points on serve vs Valchev K.
wins 57% of points on serve vs Shandarov V.
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