Chiaki Okadaue defeated Remi Tezuka 6-7 6-3 6-2 in the Obihiro-Tokachi 25K round of 16 on carpet. The upset overturned the form book — Remi Tezuka came in leading the head-to-head 1–0. Chiaki Okadaue claimed a first win over Remi Tezuka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-10-24 | Tokyo 2 10K | R32 | hard | Remi Tezuka | 6-1 7-6(5) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.