Wing Yau Venise Chan defeated Seiko Okamoto 6-2 6-3 in the Shenzhen 10K round of 16 on hard. The upset overturned the form book — Seiko Okamoto came in leading the head-to-head 1–0. Wing Yau Venise Chan claimed a first win over Seiko Okamoto in two meetings, levelling the head-to-head at 1–1.
Yau Venise Chan W. took it in straight sets.
Wing Yau Venise Chan beat Seiko Okamoto 6-2 6-3. Umpiry, "Wing Yau Venise Chan vs Seiko Okamoto — Shenzhen 10K Round of 16", https://umpiry.com/match/2009-07-06/chan-vs-okamoto-shenzhen-10k-r16?utm_source=cite (as of 6 July 2009).