Gilles Muller defeated Quentin Halys 6-4 6-7 6-3 in the Atlanta round of 16 on hard. The upset overturned the form book — Quentin Halys came in leading the head-to-head 1–0. Gilles Muller claimed a first win over Quentin Halys in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-07-30 | Los Cabos | R32 | hard | Quentin Halys | 6-4 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
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (77 vs 200). ATP, WTA & Challenger.