Nungnadda Wannasuk defeated Ai Koga 3-6 6-3 6-3 in the Yeong Wol 10K round of 16 on hard. The result followed the form book — Nungnadda Wannasuk came in leading the head-to-head 1–0. Nungnadda Wannasuk extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-14 | Kyoto 10K | R32 | carpet | Nungnadda Wannasuk | 6-1 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.