Seong Gook Oh defeated Hong Chung 1-6 6-3 6-0 in the Korea F5 qualifying round on clay.
Gook Oh S. came through in three sets.
Seong Gook Oh beat Hong Chung 1-6 6-3 6-0. Umpiry, "Seong Gook Oh vs Hong Chung — Korea F5 Qualifying Round", https://umpiry.com/match/2017-06-26/chung-vs-oh-korea-f5-qf?utm_source=cite (as of 26 June 2017).