Yu Shan defeated Ya Hsin Lee 6-4 6-2 in the W35 Naiman 1 q16 on hard. The upset overturned the form book — Ya Hsin Lee came in leading the head-to-head 1–0. Yu Shan claimed a first win over Ya Hsin Lee in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-11-25 | W15 Nonthaburi 1 | Q32 | hard | Ya Hsin Lee | 4-6 6-4 10-5 |
Averages over each player's completed matches in the selected window (11 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