Wynne Prakusya defeated Yoon Jeong Cho 3-6 7-6 6-4 in the INA vs KOR round robin on hard. The upset overturned the form book — Yoon Jeong Cho came in leading the head-to-head 2–0, but Wynne Prakusya had been the form player, winning 6 of their last 10 on hard. Wynne Prakusya claimed a first win over Yoon Jeong Cho in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-10-12 | Seoul II 25K | R32 | hard | Yoon Jeong Cho | 6-4 2-6 7-5 |
| 1997-04-07 | Jakarta 10K | R16 | hard | Yoon Jeong Cho | 6-3 6-3 |
Averages over each player's completed matches in the selected window (1 vs 15). 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