Gustavo Kuerten defeated Mariano Zabaleta 6-3 6-3 in the Auckland semi-final on hard. The upset overturned the form book — Mariano Zabaleta came in leading the head-to-head 2–0, defending last year's round of 32. Gustavo Kuerten claimed a first win over Mariano Zabaleta in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-11 | Cincinnati Masters | R64 | hard | Mariano Zabaleta | 6-4 6-0 |
| 2003-02-24 | Acapulco | SF | hard | Mariano Zabaleta | 7-6(4) 6-7(3) 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 (115 vs 166). ATP, WTA & Challenger.