Denis Gremelmayr defeated Sam Querrey 5-7 7-6 6-3 in the San Jose round of 32 on hard. The upset overturned the form book — Sam Querrey came in leading the head-to-head 1–0, defending last year's round of 16. Denis Gremelmayr claimed a first win over Sam Querrey in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-02-09 | San Jose | R16 | hard | Sam Querrey | 6-3 6-2 |
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 (60 vs 200). ATP, WTA & Challenger.