Sandy Gumulya defeated Mi Yoo 7-6 6-4 in the Jakarta 4 10K qualifying round on hard. The upset overturned the form book — Mi Yoo came in leading the head-to-head 1–0. Sandy Gumulya claimed a first win over Mi Yoo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-31 | Nonthaburi 10K | R16 | hard | Mi Yoo | 6-1 6-4 |
Averages over each player's completed matches in the selected window (2 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