Hyeong Jin Cho defeated Seung Jae Lee 6-3 5-7 6-3 in the Korea F1 qualifying round of 32 on hard. The upset overturned the form book — Seung Jae Lee came in leading the head-to-head 1–0. Hyeong Jin Cho claimed a first win over Seung Jae Lee in two meetings, levelling the head-to-head at 1–1.
Cho H. came through in three sets.
Hyeong Jin Cho beat Seung Jae Lee 6-3 5-7 6-3. Umpiry, "Hyeong Jin Cho vs Seung Jae Lee — Korea F1 Qualifying Round of 32", https://umpiry.com/match/2015-05-18/cho-vs-lee-korea-f1-q32?utm_source=cite (as of 18 May 2015).