Michael Kohlmann defeated Tommy Haas 7-6 6-4 in the Hamburg Masters round of 64 on clay. The upset overturned the form book — Tommy Haas came in leading the head-to-head 1–0, defending last year's quarter-final, but Michael Kohlmann had been the form player, winning 2 of their last 4 on clay. Michael Kohlmann claimed a first win over Tommy Haas in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-18 | Australian Open | R128 | hard | Tommy Haas | 7-6(5) 6-2 7-5 |
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 (42 vs 200). ATP, WTA & Challenger.