Mariano Zabaleta defeated Younes El Aynaoui 6-7 6-4 7-5 in the Cincinnati Masters round of 32 on hard. The upset overturned the form book — Younes El Aynaoui came in leading the head-to-head 4–1, defending last year's round of 64. Mariano Zabaleta narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-05-26 | Roland Garros | R32 | clay | Mariano Zabaleta | 6-2 6-4 3-6 7-6(2) |
| 2001-04-09 | Casablanca | QF | clay | Younes El Aynaoui | 6-4 6-2 |
| 2000-05-08 | Rome Masters | R32 | clay | Younes El Aynaoui | 3-6 7-6(2) 7-6(6) |
| 1999-08-02 | Amsterdam | F | clay | Younes El Aynaoui | 6-0 6-3 |
| 1998-10-26 | Mexico City | R32 | clay | Younes El Aynaoui | 6-3 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 (166 vs 83). ATP, WTA & Challenger.