Andreas Vinciguerra defeated Stefan Koubek 6-4 6-4 6-1 in the Australian Open round of 128 on hard. The upset overturned the form book — Stefan Koubek came in leading the head-to-head 2–0, defending last year's quarter-final. Andreas Vinciguerra claimed a first win over Stefan Koubek in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-01-02 | Doha | QF | hard | Stefan Koubek | 6-3 6-4 |
| 2002-12-30 | Doha | QF | hard | Stefan Koubek | 6-3 6-4 |
Averages over each player's completed matches in the selected window (36 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About