Ao Gai defeated Mai Minokoshi 6-4 7-6 in the Wuhan round of 32 on hard. The upset overturned the form book — Mai Minokoshi came in defending last year's quarter-final.
Gai A. took it in straight sets.
Ao Gai beat Mai Minokoshi 6-4 7-6(4). Umpiry, "Ao Gai vs Mai Minokoshi — Wuhan Round of 32", https://umpiry.com/match/2018-05-15/gai-vs-minokoshi-wuhan-r32?utm_source=cite (as of 15 May 2018).