Stefan Koubek defeated Michael Chang 6-3 3-6 7-5 in the Vienna round of 16 on hard. The result followed the form book — Stefan Koubek came in leading the head-to-head 1–0, defending last year's quarter-final. Stefan Koubek extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-26 | Atlanta | R16 | hard | Stefan Koubek | 6-1 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 73). ATP, WTA & Challenger.