Samantha Stosur defeated Yanina Wickmayer 7-5 3-6 6-3 in the Stanford quarter-final on hard. The result followed the form book — Samantha Stosur came in leading the head-to-head 4–1, defending last year's semi-final. Samantha Stosur extended the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-05-28 | Roland Garros | R128 | clay | Samantha Stosur | 6-2 6-4 |
| 2016-03-07 | Indian Wells | R64 | hard | Samantha Stosur | 2-6 6-4 7-6(6) |
| 2014-06-23 | Wimbledon | R128 | grass | Yanina Wickmayer | 6-3 6-4 |
| 2011-01-10 | Sydney | R32 | hard | Samantha Stosur | 7-5 6-4 |
| 2009-05-25 | Roland Garros | R64 | clay | Samantha Stosur | 6-3 4-6 6-4 |
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 (197 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About