Shiho Hisamatsu defeated Nudnida Luangnam 1-6 6-3 6-2 in the Tsukuba 25K round of 16 on hard. The upset overturned the form book — Nudnida Luangnam came in leading the head-to-head 2–1, but Shiho Hisamatsu had been the form player, winning 4 of their last 8 on hard. Shiho Hisamatsu narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-09-06 | Noto 25K | QF | carpet | Nudnida Luangnam | 6-0 6-3 |
| 2009-06-29 | Xiamen 25K | R32 | hard | Nudnida Luangnam | 7-6(5) |
| 2006-09-25 | Tokyo 50K | R16 | hard | Shiho Hisamatsu | 6-1 6-3 |
Averages over each player's completed matches in the selected window (3 vs 70). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About