Sergiy Stakhovsky defeated John Isner 7-5 4-6 7-6 in the Madrid Masters round of 32 on clay. The upset overturned the form book — John Isner came in leading the head-to-head 1–0, defending last year's round of 16. Sergiy Stakhovsky claimed a first win over John Isner in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-03-25 | Miami Masters | R128 | hard | John Isner | 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
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About