Felix Mantilla defeated Gustavo Kuerten 6-4 2-6 6-4 in the Long Island quarter-final on hard. The upset overturned the form book — Gustavo Kuerten came in leading the head-to-head 4–2, defending last year's round of 16. Felix Mantilla narrowed the head-to-head to 4–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-04-21 | Barcelona | R32 | clay | Gustavo Kuerten | 7-6(1) 6-3 |
| 2003-02-17 | Buenos Aires | QF | clay | Gustavo Kuerten | 6-2 6-7(4) 6-1 |
| 2001-02-26 | Acapulco | R32 | hard | Gustavo Kuerten | 6-4 6-1 |
| 1999-04-19 | Monte Carlo Masters | SF | clay | Gustavo Kuerten | 3-6 6-3 6-4 |
| 1997-07-14 | Stuttgart Outdoor | R16 | clay | Felix Mantilla | 4-1 RET |
| 1997-06-09 | Bologna | F | clay | Felix Mantilla | 4-6 6-2 6-1 |
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.