Sloane Stephens defeated Shuai Zhang 6-4 6-2 in the San Diego round of 64 on hard. The upset overturned the form book — Shuai Zhang came in ranked #54, leading the head-to-head 3–2, but Sloane Stephens had been the form player, winning 4 of their last 6 on hard. Sloane Stephens narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-01-20 | Australian Open | R128 | hard | Shuai Zhang | 2-6 7-5 6-2 |
| 2019-09-23 | Wuhan | R64 | hard | Sloane Stephens | 7-5 6-4 |
| 2018-01-15 | Australian Open | R128 | hard | Shuai Zhang | 2-6 7-6 6-2 |
| 2014-06-09 | Birmingham | QF | grass | Shuai Zhang | 6-3 6-1 |
| 2013-05-20 | Brussels | R16 | clay | Sloane Stephens | 6-4 6-0 |
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Stephens S.: 2 days rest · 4 matches, 81 games (7d) · Zhang S.: 4 days rest · 2 matches, 45 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About