Nungnadda Wannasuk defeated Yuka Mori 6-2 6-1 in the Tokyo 10K round of 16 on hard. The upset overturned the form book — Yuka Mori came in leading the head-to-head 1–0, but Nungnadda Wannasuk had been the form player, winning 3 of their last 7 on hard. Nungnadda Wannasuk claimed a first win over Yuka Mori in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-06-18 | Mie 10K | R32 | grass | Yuka Mori | 7-5 7-6(3) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.