Guido Andreozzi defeated Patricio Heras 4-6 6-3 6-4 in the Chile F9 round of 16 on clay. The upset overturned the form book — Patricio Heras came in leading the head-to-head 1–0, but Guido Andreozzi had been the form player, winning 5 of their last 8 on clay. Guido Andreozzi claimed a first win over Patricio Heras in two meetings, levelling the head-to-head at 1–1.
Andreozzi G. came through in three sets.
Guido Andreozzi beat Patricio Heras 4-6 6-3 6-4. Umpiry, "Guido Andreozzi vs Patricio Heras — Chile F9 Round of 16", https://umpiry.com/match/2010-12-13/andreozzi-vs-heras-chile-f9-r16?utm_source=cite (as of 13 December 2010).