Zi Yan defeated Anna Chakvetadze 6-3 6-3 in the Sydney round of 32 on hard. The upset overturned the form book — Anna Chakvetadze came in leading the head-to-head 3–0. Zi Yan claimed a first win over Anna Chakvetadze in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-02-07 | Fed Cup WG R1: RUS vs CHN | RR | hard | Anna Chakvetadze | 6-1 6-2 |
| 2007-05-14 | Rome | R32 | clay | Anna Chakvetadze | 6-1 6-3 |
| 2006-06-26 | Wimbledon | R128 | grass | Anna Chakvetadze | 6-3 6-2 |
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 (51 vs 199). ATP, WTA & Challenger.