Juan Carlos Saez defeated Guillermo Rivera Aranguiz 6-3 7-5 in the Chile F5 qualifying round on clay. The upset overturned the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 2–0, but Juan Carlos Saez had been the form player, winning 6 of their last 10 on clay. Juan Carlos Saez claimed a first win over Guillermo Rivera Aranguiz in three meetings, narrowing the head-to-head to 2–1.
Saez J. took it in straight sets.
Juan Carlos Saez beat Guillermo Rivera Aranguiz 6-3 7-5. Umpiry, "Juan Carlos Saez vs Guillermo Rivera Aranguiz — Chile F5 Qualifying Round", https://umpiry.com/match/2012-05-21/aranguiz-vs-saez-chile-f5-qf?utm_source=cite (as of 21 May 2012).