Guillermo Rivera Aranguiz defeated Cristobal Saavedra Corvalan 6-0 6-7 6-2 in the Chile F15 qualifying round on clay. The upset overturned the form book — Cristobal Saavedra Corvalan came in leading the head-to-head 3–2. That levelled the head-to-head at 3–3.
Rivera Aranguiz G. came through in three sets.
Guillermo Rivera Aranguiz beat Cristobal Saavedra Corvalan 6-0 6-7(3) 6-2. Umpiry, "Guillermo Rivera Aranguiz vs Cristobal Saavedra Corvalan — Chile F15 Qualifying Round", https://umpiry.com/match/2012-12-10/aranguiz-vs-corvalan-chile-f15-qf?utm_source=cite (as of 10 December 2012).