Nudnida Luangnam defeated Maya Kato 6-3 6-4 in the Pattaya 10K round of 16 on hard. The upset overturned the form book — Maya Kato came in leading the head-to-head 2–0, but Nudnida Luangnam had been the form player, winning 3 of their last 4 on hard. Nudnida Luangnam claimed a first win over Maya Kato in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-14 | Kyoto 10K | QF | carpet | Maya Kato | 6-2 3-6 6-2 |
| 2008-09-08 | Noto 25K | R32 | carpet | Maya Kato | 6-1 4-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.