Yusuke Watanuki defeated Ku Keon Kang 6-1 6-1 in the Korea F5 round of 32 on hard. The upset overturned the form book — Ku Keon Kang came in leading the head-to-head 1–0. Yusuke Watanuki claimed a first win over Ku Keon Kang in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-08-11 | Korea F10 | QF | hard | Ku Keon Kang | 6-1 3-6 6-2 |
Averages over each player's completed matches in the selected window (47 vs 23). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About