Mariano Zabaleta defeated Cedric Pioline 4-6 6-3 7-6 in the Gstaad round of 32 on clay. The upset overturned the form book — Cedric Pioline came in leading the head-to-head 2–0, defending last year's round of 16. Mariano Zabaleta claimed a first win over Cedric Pioline in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-03-08 | Indian Wells Masters | R64 | hard | Cedric Pioline | 6-4 4-6 6-3 |
| 1999-01-04 | Doha | QF | hard | Cedric Pioline | 7-6(2) 6-2 |
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 177). ATP, WTA & Challenger.