Seong Gook Oh defeated Oh Hee Kwon 6-2 6-2 in the M15 Anseong 1 round of 16 on clay. The upset overturned the form book — Oh Hee Kwon came in leading the head-to-head 1–0. Seong Gook Oh claimed a first win over Oh Hee Kwon in two meetings, levelling the head-to-head at 1–1.
Gook Oh S. took it in straight sets.
Clay: Gook Oh S. leads 1–0 · Hard: Kwon O. leads 1–0
Seong Gook Oh beat Oh Hee Kwon 6-2 6-2. Umpiry, "Seong Gook Oh vs Oh Hee Kwon — M15 Anseong 1 Round of 16", https://umpiry.com/match/2019-06-27/kwon-vs-oh-m15-anseong-1-r16?utm_source=cite (as of 27 June 2019).