Jae Sung An defeated Daniel Yoo 6-2 7-6 in the Korean Rep F4 round of 16 on hard.
An J. took it in straight sets.
Jae Sung An beat Daniel Yoo 6-2 7-6(3). Umpiry, "Jae Sung An vs Daniel Yoo — Korean Rep F4 Round of 16", https://umpiry.com/match/2009-04-27/an-vs-yoo-korean-rep-f4-r16?utm_source=cite (as of 27 April 2009).