Riko Sawayanagi defeated Sung Hee Han 6-4 6-4 in the Seoul qualifying round 1 on hard. The upset overturned the form book — Sung Hee Han came in leading the head-to-head 1–0. Riko Sawayanagi claimed a first win over Sung Hee Han in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-25 | Changwon $25K | R16 | hard | Sung Hee Han | 6-3 6-1 |
Averages over each player's completed matches in the selected window (81 vs 1). 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. Small sample — read as indicative. About