Min Hyoek Cho defeated Cheong Eui Kim 6-4 6-4 in the Korea F4 qualifying round on hard. The upset overturned the form book — Cheong Eui Kim came in leading the head-to-head 2–1, but Min Hyoek Cho had been the form player, winning 2 of their last 4 on hard. That levelled the head-to-head at 2–2.
Hyoek Cho M. took it in straight sets.
Min Hyoek Cho beat Cheong Eui Kim 6-4 6-4. Umpiry, "Min Hyoek Cho vs Cheong Eui Kim — Korea F4 Qualifying Round", https://umpiry.com/match/2015-08-17/cho-vs-kim-korea-f4-qf?utm_source=cite (as of 17 August 2015).