Kumiko Iijima defeated Suchanun Viratprasert 6-3 6-1 in the Ho Chi Minh City 25K round of 16 on hard. The result followed the form book — Kumiko Iijima came in leading the head-to-head 4–1. Kumiko Iijima extended the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-10-13 | Makinohara 25K | R16 | carpet | Kumiko Iijima | 6-4 6-1 |
| 2008-09-08 | Noto 25K | F | carpet | Suchanun Viratprasert | 6-4 6-4 |
| 2008-05-26 | Gunma 25K | SF | carpet | Kumiko Iijima | 6-3 6-1 |
| 2005-06-06 | Beijing 1 50K | R32 | hard | Kumiko Iijima | 6-0 6-3 |
| 2002-04-15 | Gunma 10K | R32 | carpet | Kumiko Iijima | 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.