Tommy Haas defeated Mario Ancic 6-1 7-5 in the Athens Olympics round of 64 on hard. The upset overturned the form book — Mario Ancic came in leading the head-to-head 2–1. Tommy Haas narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-08-13 | Cincinnati Masters | R64 | hard | Mario Ancic | 3-6 7-6(3) 6-3 |
| 2007-02-09 | Davis Cup WG R1: GER vs CRO | RR | hard | Tommy Haas | 2-6 6-4 6-4 6-4 |
| 2005-03-21 | Miami Masters | R32 | hard | Mario Ancic | 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.