Agustin Picco defeated Guillermo Rivera Aranguiz 6-4 6-3 in the Chile F5 quarter-final on clay. The upset overturned the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 2–0. Agustin Picco claimed a first win over Guillermo Rivera Aranguiz in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-06-14 | Argentina F9 | QF | clay | Guillermo Rivera Aranguiz | 6-2 7-6(1) |
| 2009-10-26 | Chile F4 | QF | clay | Guillermo Rivera Aranguiz | 6-1 3-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.