Marco Osorio defeated Flavio Saretta 3-6 6-0 6-1 in the Mexico F5 semi-final on hard. The upset overturned the form book — Flavio Saretta came in leading the head-to-head 1–0. Marco Osorio claimed a first win over Flavio Saretta in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-11-01 | Mexico F7 | F | hard | Flavio Saretta | 6-2 6-7 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.