Sachie Ishizu defeated Erika Sema 6-3 6-3 in the Makinohara 25K round of 32 on carpet. The upset overturned the form book — Erika Sema came in leading the head-to-head 3–1. Sachie Ishizu narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-03-25 | Bundaberg 25K | R16 | clay | Erika Sema | 1-6 6-1 6-4 |
| 2011-05-23 | Niigata 25K | F | hard | Erika Sema | 7-6(5) 6-4 |
| 2010-03-22 | Kofu 10K | R16 | hard | Sachie Ishizu | 6-4 2-6 7-5 |
| 2007-07-30 | Obihiro 25K | R32 | carpet | Erika Sema | 6-1 6-1 |
Averages over each player's completed matches in the selected window (12 vs 199). 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. About