Ignacio Monzon defeated Ryusei Makiguchi 1-6 6-1 6-2 in the Croatia F4 round of 32 on clay. The upset overturned the form book — Ryusei Makiguchi came in leading the head-to-head 1–0, but Ignacio Monzon had been the form player, winning 7 of their last 10 on clay. Ignacio Monzon claimed a first win over Ryusei Makiguchi in two meetings, narrowing the head-to-head to 1–1.
Monzon I. came through in three sets.