Carlos Avellan defeated Caio Zampieri 6-4 6-4 in the Brazil F1 round of 16 on clay. The upset overturned the form book — Caio Zampieri came in leading the head-to-head 1–0, but Carlos Avellan had been the form player, winning 4 of their last 6 on clay. Carlos Avellan claimed a first win over Caio Zampieri in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-05-22 | Brazil F2 | R16 | clay | Caio Zampieri | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.