Juan Pablo Guzman defeated Ricardo Schlachter 7-5 4-6 6-3 in the Brazil F6 qualifying round on clay. The upset overturned the form book — Ricardo Schlachter came in leading the head-to-head 1–0, but Juan Pablo Guzman had been the form player, winning 6 of their last 9 on clay. Juan Pablo Guzman claimed a first win over Ricardo Schlachter in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-19 | Uruguay F1 | QF | clay | Ricardo Schlachter | 2-6 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.