David Guez defeated Illya Marchenko 6-7 7-6 6-2 in the Quimper CH quarter-final on hard. The upset overturned the form book — Illya Marchenko came in leading the head-to-head 1–0, but David Guez had been the form player, winning 3 of their last 8 on hard. David Guez claimed a first win over Illya Marchenko in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-31 | US Open | Q2 | hard | Illya Marchenko | 6-2 7-6(4) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (109 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About