Sheng Nan Sun defeated Chiaki Okadaue 6-3 4-6 6-4 in the Quanzhou 50K qualifying round 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 |
|---|---|---|---|---|---|
| 2013-05-27 | Changwon 25K | R16 | hard | Sheng Nan Sun | 6-4 6-1 |
Averages over each player's completed matches in the selected window (1 vs 2). 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