Seong Woon Yu defeated Seong Gook Oh 4-6 6-4 6-4 in the Korea F4 qualifying round of 32 on hard.
Woon Yu S. came through in three sets.
Seong Woon Yu beat Seong Gook Oh 4-6 6-4 6-4. Umpiry, "Seong Woon Yu vs Seong Gook Oh — Korea F4 Qualifying Round of 32", https://umpiry.com/match/2015-08-17/oh-vs-yu-korea-f4-q32?utm_source=cite (as of 17 August 2015).