Sheng Nan Sun defeated Chiaki Okadaue 6-4 6-1 in the Changwon 25K round of 16 on hard. The result followed the form book — Sheng Nan Sun came in leading the head-to-head 1–0. Sheng Nan Sun extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-03 | Quanzhou 50K | QF | hard | Sheng Nan Sun | 6-3 4-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.