Yu An Chen defeated Satoko Kurioka 6-3 3-6 6-2 in the Ibaraki 1 10K round of 16 on hard. The upset overturned the form book — Satoko Kurioka came in leading the head-to-head 1–0. Yu An Chen claimed a first win over Satoko Kurioka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-09-06 | Ibaraki 2 10K | F | hard | Satoko Kurioka | 6-3 6-4 |