Guillermo Hormazabal defeated Guillermo Rivera Aranguiz 7-5 6-2 in the Chile F2 final on clay. The upset overturned the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 2–1. Guillermo Hormazabal narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-02-20 | Chile F3 | SF | clay | Guillermo Rivera Aranguiz | 7-5 7-6(3) |
| 2010-12-06 | Chile F8 | QF | clay | Guillermo Hormazabal | 7-6(2) 7-5 |
| 2010-10-18 | Chile F1 | SF | clay | Guillermo Rivera Aranguiz | 6-0 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.