Tommy Haas defeated Juan Ignacio Chela 6-7 6-3 7-6 in the Vienna round of 32 on hard. The upset overturned the form book — Juan Ignacio Chela came in leading the head-to-head 2–1, defending last year's quarter-final. Tommy Haas narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-04-19 | Monte Carlo Masters | R32 | clay | Juan Ignacio Chela | 6-4 1-6 6-3 |
| 2004-03-08 | Indian Wells Masters | R16 | hard | Juan Ignacio Chela | 6-4 6-2 |
| 2002-05-06 | Rome Masters | R32 | clay | Tommy Haas | 7-5 6-1 |
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 (191 vs 68). ATP, WTA & Challenger.