Guillermo Rivera Aranguiz defeated Benjamin Ugarte 7-5 6-4 in the Chile F15 round of 16 on clay. The result followed the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 1–0. Guillermo Rivera Aranguiz extended the head-to-head to 2–0.
Rivera Aranguiz G. took it in straight sets.
Guillermo Rivera Aranguiz beat Benjamin Ugarte 7-5 6-4. Umpiry, "Guillermo Rivera Aranguiz vs Benjamin Ugarte — Chile F15 Round of 16", https://umpiry.com/match/2012-12-10/aranguiz-vs-ugarte-chile-f15-r16?utm_source=cite (as of 10 December 2012).