Fang Ying Xun defeated Ayaka Okuno 6-2 6-2 in the Wuhan round of 16 on hard. The upset overturned the form book — Ayaka Okuno came in defending last year's round of 32.
Xun F. took it in straight sets.
Fang Ying Xun beat Ayaka Okuno 6-2 6-2. Umpiry, "Fang Ying Xun vs Ayaka Okuno — Wuhan Round of 16", https://umpiry.com/match/2017-05-31/okuno-vs-xun-wuhan-r16?utm_source=cite (as of 31 May 2017).