Seong Woon Yu defeated Tae Woo Lee 4-6 7-6 6-4 in the Korea F5 qualifying round of 16 on hard. The upset overturned the form book — Tae Woo Lee came in leading the head-to-head 1–0. Seong Woon Yu claimed a first win over Tae Woo Lee in two meetings, levelling the head-to-head at 1–1.
Woon Yu S. came through in three sets.
Seong Woon Yu beat Tae Woo Lee 4-6 7-6(4) 6-4. Umpiry, "Seong Woon Yu vs Tae Woo Lee — Korea F5 Qualifying Round of 16", https://umpiry.com/match/2015-08-24/lee-vs-yu-korea-f5-q16?utm_source=cite (as of 24 August 2015).