Ai Yamamoto defeated Sung Hee Han 6-4 6-2 in the Miyazaki 10K round of 16 on carpet. The upset overturned the form book — Sung Hee Han came in leading the head-to-head 1–0. Ai Yamamoto claimed a first win over Sung Hee Han in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-05-12 | Bangkok 10K | R16 | hard | Sung Hee Han | 6-1 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.