Erika Sema defeated Sheng Nan Sun 6-7 6-4 6-2 in the Tsukuba 25K round of 16 on hard. The result followed the form book — Erika Sema came in leading the head-to-head 2–1. Erika Sema extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-03-26 | Phuket 25K | R16 | hard | Erika Sema | 7-5 6-3 |
| 2012-03-12 | Sanya 25K | R16 | hard | Erika Sema | 6-4 6-1 |
| 2010-05-10 | Kurume 50K | R16 | grass | Sheng Nan Sun | 6-3 6-1 |
Averages over each player's completed matches in the selected window (199 vs 3). 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