Gonzalo Villanueva defeated Genaro Alberto Olivieri 6-4 6-3 in the M15 Buenos Aires 4 semi-final on clay. The upset overturned the form book — Genaro Alberto Olivieri came in ranked #274, leading the head-to-head 2–1, but Gonzalo Villanueva had been the form player, winning 6 of their last 8 on clay. Gonzalo Villanueva narrowed the head-to-head to 2–2.
Villanueva G. took it in straight sets.