Diego Junqueira defeated Patricio Arquez 3-6 6-2 6-1 in the Argentina F2 round of 16 on clay. The upset overturned the form book — Patricio Arquez came in leading the head-to-head 2–1. Diego Junqueira narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-09-13 | Argentina F6 | R16 | clay | Diego Junqueira | 6-1 7-5 |
| 2001-03-19 | Argentina F2 | R32 | clay | Patricio Arquez | 6-4 6-2 |
| 2000-09-11 | Peru F3 | R32 | clay | Patricio Arquez | 6-4 5-7 3-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.