Seung Yeon Hong defeated Hae Sung Kim 6-2 6-3 in the Changwon 25K round of 16 on hard. The upset overturned the form book — Hae Sung Kim came in leading the head-to-head 1–0. Seung Yeon Hong claimed a first win over Hae Sung Kim in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-11-07 | Manila 10K | R32 | hard | Hae Sung Kim | 7-6(2) 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.