Seong Chan Hong defeated Seong Gook Oh 6-1 6-2 in the M15 Daegu 1 semi-final on hard.
Hong S. took it in straight sets.
Seong Chan Hong beat Seong Gook Oh 6-1 6-2. Umpiry, "Seong Chan Hong vs Seong Gook Oh — M15 Daegu 1 Semi-final", https://umpiry.com/match/2019-06-08/hong-vs-oh-m15-daegu-1-sf?utm_source=cite (as of 8 June 2019).