Katie Obrien defeated I Hsuan Hwang 4-6 6-2 7-6 in the Mount Gambier 25K round of 32 on hard. The upset overturned the form book — I Hsuan Hwang came in leading the head-to-head 1–0. Katie Obrien claimed a first win over I Hsuan Hwang in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-11-05 | Port Pirie 25K | R16 | hard | I Hsuan Hwang | 3-6 6-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.