Gayeong Back defeated Sujin Yoon 3-6 7-6 6-3 in the Changwon $25K q32 on hard. The upset overturned the form book — Sujin Yoon came in leading the head-to-head 1–0. Gayeong Back claimed a first win over Sujin Yoon in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-05-26 | Changwon 25K | Q32 | hard | Sujin Yoon | 0-6 6-1 6-2 |