Heather Watson defeated Samantha Stosur 6-3 3-6 6-0 in the Australian Open round of 128 on hard. The upset overturned the form book — Samantha Stosur came in leading the head-to-head 2–0, defending last year's round of 128. Heather Watson claimed a first win over Samantha Stosur in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-07-25 | Montreal | R64 | hard | Samantha Stosur | 7-5 6-3 |
| 2015-10-12 | Hong Kong | QF | hard | Samantha Stosur | 4-6 6-3 6-0 |
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 (199 vs 153). ATP, WTA & Challenger.