Rafael Serpa Guinazu defeated Gustavo Cavallaro 4-6 6-4 6-3 in the Argentina 1 Masters 2 round of 16 on clay. The upset overturned the form book — Gustavo Cavallaro came in leading the head-to-head 1–0. Rafael Serpa Guinazu claimed a first win over Gustavo Cavallaro in two meetings, narrowing the head-to-head to 1–1.
Serpa Guinazu R. came through in three sets.