Ivan Nedelko defeated Gabriel Donev 6-3 6-4 in the M15 Novomoskovsk 1 round of 32 on clay. The upset overturned the form book — Gabriel Donev came in leading the head-to-head 1–0, but Ivan Nedelko had been the form player, winning 8 of their last 10 on clay. Ivan Nedelko claimed a first win over Gabriel Donev in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-28 | M15 Novi Sad 1 | R32 | clay | Gabriel Donev | 6-4 6-1 |
Averages over each player's completed matches in the selected window (25 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