Remi Tezuka defeated Chiaki Okadaue 6-1 7-6 in the Tokyo 2 10K round of 32 on hard. The upset overturned the form book — Chiaki Okadaue came in leading the head-to-head 1–0. Remi Tezuka claimed a first win over Chiaki Okadaue in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-07-27 | Obihiro-Tokachi 25K | R16 | carpet | Chiaki Okadaue | 6-7(2) 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.