Rafael Serpa Guinazu defeated Martin Vassallo Arguello 6-4 6-4 in the Argentina 2 Masters 1 round of 16 on clay. The upset overturned the form book — Martin Vassallo Arguello came in leading the head-to-head 1–0. Rafael Serpa Guinazu claimed a first win over Martin Vassallo Arguello in two meetings, narrowing the head-to-head to 1–1.
Serpa Guinazu R. took it in straight sets.