Mai Minokoshi defeated Ao Gai 6-3 6-4 in the Hong Kong round of 16 on hard. The upset overturned the form book — Ao Gai came in leading the head-to-head 1–0, but Mai Minokoshi had been the form player, winning 4 of their last 8 on hard. Mai Minokoshi claimed a first win over Ao Gai in two meetings, levelling the head-to-head at 1–1.
Minokoshi M. took it in straight sets.
Mai Minokoshi beat Ao Gai 6-3 6-4. Umpiry, "Mai Minokoshi vs Ao Gai — Hong Kong Round of 16", https://umpiry.com/match/2018-06-20/gai-vs-minokoshi-hong-kong-r16?utm_source=cite (as of 20 June 2018).