Hector Moretti defeated Joao Zwetsch 6-4 7-6 in the Brazil 1 Masters 4 round of 16 on clay. The upset overturned the form book — Joao Zwetsch came in leading the head-to-head 1–0. Hector Moretti claimed a first win over Joao Zwetsch in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1996-10-19 | Brazil 4 Masters 2 | QF | clay | Joao Zwetsch | 4-6 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.