Seong Chan Hong defeated Jae Won Choi 6-3 6-2 in the Korea F1 round of 16 on hard. The result followed the form book — Seong Chan Hong came in leading the head-to-head 1–0. Seong Chan Hong extended the head-to-head to 2–0.
Hong S. took it in straight sets.
Seong Chan Hong beat Jae Won Choi 6-3 6-2. Umpiry, "Seong Chan Hong vs Jae Won Choi — Korea F1 Round of 16", https://umpiry.com/match/2017-05-29/choi-vs-hong-korea-f1-r16?utm_source=cite (as of 29 May 2017).