Martina Hingis defeated Tian Tian Sun 6-3 6-2 in the Miami round of 64 on hard. The result followed the form book — Martina Hingis came in leading the head-to-head 1–0. Martina Hingis extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-09-17 | Beijing | R32 | hard | Martina Hingis | 6-2 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (83 vs 26). ATP, WTA & Challenger.