Sam Querrey defeated Philipp Petzschner 6-1 6-4 in the Cincinnati Masters round of 64 on hard. The upset overturned the form book — Philipp Petzschner came in leading the head-to-head 1–0, defending last year's round of 32. Sam Querrey claimed a first win over Philipp Petzschner in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-10 | Canada Masters | R64 | hard | Philipp Petzschner | 7-5 6-3 |
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 (200 vs 158). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About