Guillermo Rivera Aranguiz defeated Alex Theiler 4-6 7-5 7-6 in the Chile F9 round of 16 on clay. The result followed the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 3–0. Guillermo Rivera Aranguiz extended the head-to-head to 4–0.
Rivera Aranguiz G. came through in three sets.
Guillermo Rivera Aranguiz beat Alex Theiler 4-6 7-5 7-6(3). Umpiry, "Guillermo Rivera Aranguiz vs Alex Theiler — Chile F9 Round of 16", https://umpiry.com/match/2010-12-13/aranguiz-vs-theiler-chile-f9-r16?utm_source=cite (as of 13 December 2010).