Erika Sema defeated Kumiko Iijima 6-2 6-2 in the Wellington 25K semi-final on hard. The upset overturned the form book — Kumiko Iijima came in leading the head-to-head 2–0. Erika Sema claimed a first win over Kumiko Iijima in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-09-27 | Hamanako 25K | F | carpet | Kumiko Iijima | 6-7(4) 6-2 6-4 |
| 2007-07-30 | Obihiro 25K | R16 | carpet | Kumiko Iijima | 6-0 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.