Nungnadda Wannasuk advanced when Seiko Okamoto retired 6-3 in the Kyoto 10K qualifying round. Nungnadda Wannasuk claimed a first win over Seiko Okamoto in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-10-20 | Hamanako 25K | R32 | carpet | Seiko Okamoto | 6-1 7-6(4) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.