Mari Tanaka defeated Saori Karikomi 2-6 6-2 6-4 in the Obihiro 25K round of 32 on carpet. The upset overturned the form book — Saori Karikomi came in leading the head-to-head 1–0, but Mari Tanaka had been the form player, winning 3 of their last 6 on carpet. Mari Tanaka claimed a first win over Saori Karikomi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-06-05 | Tokyo 1 10K | R32 | hard | Saori Karikomi | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.