Mi Yoo defeated Sandy Gumulya 6-1 6-4 in the Nonthaburi 10K round of 16 on hard. The upset overturned the form book — Sandy Gumulya came in leading the head-to-head 1–0, but Mi Yoo had been the form player, winning 6 of their last 8 on hard. Mi Yoo claimed a first win over Sandy Gumulya in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-12-06 | Jakarta 4 10K | QF | hard | Sandy Gumulya | 7-6(4) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.