Chihiro Takayama defeated Kazusa Ito 6-3 1-6 6-1 in the Sutama 10K round of 16 on clay. The upset overturned the form book — Kazusa Ito came in leading the head-to-head 2–1. Chihiro Takayama narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-30 | Mie 10K | QF | carpet | Kazusa Ito | 6-3 7-6(5) |
| 2009-05-18 | Nagano 25K | R32 | carpet | Chihiro Takayama | 6-7(6) 6-2 7-5 |
| 2008-09-15 | Kyoto 10K | R32 | carpet | Kazusa Ito | 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.