Issei Okamura defeated Kento Takeuchi 6-2 6-2 in the China F14 round of 32 on hard. The upset overturned the form book — Kento Takeuchi came in leading the head-to-head 3–1. Issei Okamura narrowed the head-to-head to 3–2.
Okamura I. took it in straight sets.
Hard: Okamura I. leads 2–1 · Clay: Takeuchi K. leads 2–0
Issei Okamura beat Kento Takeuchi 6-2 6-2. Umpiry, "Issei Okamura vs Kento Takeuchi — China F14 Round of 32", https://umpiry.com/match/2017-07-24/okamura-vs-takeuchi-china-f14-r32?utm_source=cite (as of 24 July 2017).