Sihyeong Cho defeated Yu Jin Ahn 3-6 6-4 10-3 in the W15 Wuning 2 q32 on hard. The upset overturned the form book — Yu Jin Ahn came in leading the head-to-head 1–0. Sihyeong Cho claimed a first win over Yu Jin Ahn in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-09-04 | W15 Yeongwol 2 | R32 | hard | Yu Jin Ahn | 6-4 7-5 |
Averages over each player's completed matches in the selected window (24 vs 48). 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