Saori Obata defeated Haruka Inoue 5-7 6-4 6-2 in the Fukuoka 50K round of 16 on grass. The upset overturned the form book — Haruka Inoue came in leading the head-to-head 2–0. Saori Obata claimed a first win over Haruka Inoue in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-12-06 | Manila 25K | R16 | hard | Haruka Inoue | 1-6 6-4 6-4 |
| 1998-03-16 | Noda 25K | QF | hard | Haruka Inoue | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.