Joao Souza defeated Caio Zampieri 6-4 6-3 in the Brazil F21 qualifying round on clay. The upset overturned the form book — Caio Zampieri came in leading the head-to-head 2–0, but Joao Souza had been the form player, winning 3 of their last 7 on clay. Joao Souza claimed a first win over Caio Zampieri in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-02-09 | Costa Do Sauipe | QF | hard | Caio Zampieri | 3-6 7-6(5) 7-6(8) |
| 2006-12-04 | Brazil F22 | R16 | hard | Caio Zampieri | 6-4 4-6 6-4 |
Averages over each player's completed matches in the selected window (200 vs 101). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About