Patricio Arquez defeated Cristian Villagran 6-3 7-5 in the Chile F6 round of 16 on clay. The upset overturned the form book — Cristian Villagran came in leading the head-to-head 2–0. Patricio Arquez claimed a first win over Cristian Villagran in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-04-25 | Argentina F3 | R32 | clay | Cristian Villagran | 6-2 6-7(2) 6-4 |
| 2004-09-06 | Argentina F5 | QF | clay | Cristian Villagran | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.