Byung Kook Kang defeated Tsung Hua Yang 4-6 7-5 6-4 in the Indonesia F3 round of 16 on hard. The upset overturned the form book — Tsung Hua Yang came in leading the head-to-head 2–0, but Byung Kook Kang had been the form player, winning 2 of their last 6 on hard. Byung Kook Kang claimed a first win over Tsung Hua Yang in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-12-02 | Cambodia F2 | R32 | hard | Tsung Hua Yang | 6-4 6-3 |
| 2009-04-27 | Korean Rep F4 | R16 | hard | Tsung Hua Yang | 6-4 1-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.