Sebastian Prieto defeated Rainer Marzenell 6-1 6-3 in the Bolivia Chile Masters 3 round of 16 on clay. The upset overturned the form book — Rainer Marzenell came in leading the head-to-head 1–0, but Sebastian Prieto had been the form player, winning 1 of their last 4 on clay. Sebastian Prieto claimed a first win over Rainer Marzenell in two meetings, narrowing the head-to-head to 1–1.
Prieto S. took it in straight sets.