Seong Gook Oh defeated Sang Oh Oh 6-4 6-2 in the Korea F5 q16 on hard. The upset overturned the form book — Sang Oh Oh came in leading the head-to-head 1–0. Seong Gook Oh claimed a first win over Sang Oh Oh in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-06-16 | Korea F6 | Q16 | hard | Sang Oh Oh | 3-6 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.