Thomas Enqvist defeated Tommy Haas 6-4 6-4 in the Dusseldorf round robin on clay. The upset overturned the form book — Tommy Haas came in leading the head-to-head 9–1, defending the title, but Thomas Enqvist had been the form player, winning 1 of their last 4 on clay. Thomas Enqvist narrowed the head-to-head to 9–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-03-08 | Indian Wells Masters | R128 | hard | Tommy Haas | 6-4 3-6 6-3 |
| 2002-08-26 | US Open | R32 | hard | Tommy Haas | 6-4 3-6 3-6 6-4 6-4 |
| 2001-10-08 | Vienna | SF | hard | Tommy Haas | 6-7(4) 6-2 7-6(4) |
| 2001-10-01 | Moscow | R16 | hard | Tommy Haas | 7-5 6-2 |
| 2000-05-21 | Dusseldorf | RR | clay | Tommy Haas | 5-7 6-2 6-2 |
| 2000-05-01 | Munich | SF | clay | Tommy Haas | 7-6(5) 1-6 6-4 |
| 1999-09-27 | Grand Slam Cup | SF | carpet | Tommy Haas | 6-3 6-4 6-7(4) 6-4 |
| 1999-08-30 | US Open | R128 | hard | Tommy Haas | 6-2 6-4 7-6(6) |
| 1997-10-13 | Lyon | QF | clay | Tommy Haas | 6-3 6-3 |
| 1997-07-28 | Canada Masters | R32 | hard | Thomas Enqvist | 6-7(3) 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.