Jan Michael Gambill defeated David Sanchez 7-6 6-2 6-2 in the US Open round of 128 on hard. The upset overturned the form book — David Sanchez came in leading the head-to-head 2–0, defending last year's round of 128. Jan Michael Gambill claimed a first win over David Sanchez in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-05-17 | St. Poelten | R32 | clay | David Sanchez | 6-3 6-4 |
| 2004-01-12 | Auckland | R32 | hard | David Sanchez | 7-6(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 (99 vs 117). ATP, WTA & Challenger.