Chiaki Okadaue defeated Etsuko Kitazaki 2-6 6-4 6-4 in the Tokyo 10K round of 16 on hard. The upset overturned the form book — Etsuko Kitazaki came in leading the head-to-head 1–0, but Chiaki Okadaue had been the form player, winning 4 of their last 7 on hard. Chiaki Okadaue claimed a first win over Etsuko Kitazaki in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-10-29 | Kofu 10K | QF | hard | Etsuko Kitazaki | 6-1 5-7 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.