Juan Manuel Valverde defeated Guillermo Duran 6-2 1-6 6-1 in the Argentina F23 FUTURES round of 16 on clay. The upset overturned the form book — Guillermo Duran came in leading the head-to-head 2–1, but Juan Manuel Valverde had been the form player, winning 5 of their last 10 on clay. Juan Manuel Valverde narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-06-07 | Argentina F8 | SF | clay | Guillermo Duran | 4-6 6-3 6-3 |
| 2009-06-15 | Argentina F9 | R32 | clay | Guillermo Duran | 6-3 3-6 6-2 |
| 2008-06-23 | Brazil F10 Teresina PL | R32 | clay | Juan Manuel Valverde | 6-3 3-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.