Ji Hoon Son defeated Sang Oh Oh 4-6 7-5 6-4 in the Korea F2 round of 16 on hard.
Hoon Son J. came through in three sets.
Ji Hoon Son beat Sang Oh Oh 4-6 7-5 6-4. Umpiry, "Ji Hoon Son vs Sang Oh Oh — Korea F2 Round of 16", https://umpiry.com/match/2013-05-06/oh-vs-son-korea-f2-r16?utm_source=cite (as of 6 May 2013).