Tommy Haas defeated Felix Mantilla 6-1 6-0 6-7 6-3 in the US Open round of 64 on hard. The upset overturned the form book — Felix Mantilla 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 |
|---|---|---|---|---|---|
| 1999-05-24 | Roland Garros | R32 | clay | Felix Mantilla | 7-6(3) 6-1 6-4 |
| 1999-01-11 | Auckland | SF | hard | Tommy Haas | 4-6 6-3 6-3 |
| 1997-05-05 | Hamburg Masters | SF | clay | Felix Mantilla | 4-6 6-3 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.