Juan Vazquez Valenzuela defeated Andres Molteni 7-6 6-4 in the Argentina F19 qualifying round on clay. The upset overturned the form book — Andres Molteni came in leading the head-to-head 5–1, but Juan Vazquez Valenzuela had been the form player, winning 3 of their last 7 on clay. Juan Vazquez Valenzuela narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-06-25 | Argentina F15 | QF | clay | Andres Molteni | 6-7(2) 6-2 6-2 |
| 2012-06-11 | Argentina F12 | R16 | clay | Andres Molteni | 6-3 6-4 |
| 2011-11-28 | Chile F15 | R16 | clay | Juan Vazquez Valenzuela | 6-3 6-2 |
| 2010-01-25 | Argentina F1 | R32 | clay | Andres Molteni | 6-7(6) 6-4 6-3 |
| 2009-04-27 | Argentina F3 | R16 | clay | Andres Molteni | 5-7 6-0 4-1 |
| 2009-04-20 | Argentina F2 | R16 | clay | Andres Molteni | 7-5 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.