Ayami Takase defeated Sachie Umehara 7-6 6-3 in the Ibaraki 1 10K round of 32 on hard. The upset overturned the form book — Sachie Umehara came in leading the head-to-head 2–0. Ayami Takase claimed a first win over Sachie Umehara in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-11-22 | Kofu 10K | F | carpet | Sachie Umehara | 6-4 6-1 |
| 1997-09-08 | Kugayama 4 10K | R16 | hard | Sachie Umehara | 6-2 6-4 |