Flavio Saretta defeated Tomas Zivnicek 6-2 6-3 in the Mexico 1 Masters 4 round of 16 on hard. The upset overturned the form book — Tomas Zivnicek came in leading the head-to-head 1–0. Flavio Saretta claimed a first win over Tomas Zivnicek in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-24 | Mexico 1 Masters 1 | R16 | hard | Tomas Zivnicek | 6-4 5-7 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.