Arata Ito defeated Seong Hoon Choi 1-6 7-6 6-0 in the Japan Masters 4 round of 32 on hard. The upset overturned the form book — Seong Hoon Choi came in leading the head-to-head 1–0. Arata Ito claimed a first win over Seong Hoon Choi in two meetings, narrowing the head-to-head to 1–1.
Ito A. came through in three sets.
Hard: Ito A. leads 1–0 · Clay: Hoon Choi S. leads 1–0