Shuai Zhang defeated Ayumi Oka 6-2 6-0 in the Nagoya 25K round of 16 on hard. The result followed the form book — Shuai Zhang came in leading the head-to-head 1–0. Shuai Zhang extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-07-16 | Kurume 25K | R16 | grass | Shuai Zhang | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About