Monica Puig defeated Samantha Stosur 6-3 6-4 in the Miami round of 128 on hard. The upset overturned the form book — Samantha Stosur came in leading the head-to-head 4–2, defending last year's round of 16, but Monica Puig had been the form player, winning 2 of their last 6 on hard. Monica Puig narrowed the head-to-head to 4–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-01-15 | Australian Open | R128 | hard | Monica Puig | 4-6 7-6(6) 6-4 |
| 2016-01-11 | Sydney | QF | hard | Monica Puig | 6-4 6-4 |
| 2015-10-12 | Hong Kong | R16 | hard | Samantha Stosur | 6-4 6-4 |
| 2015-05-18 | Strasbourg | R32 | clay | Samantha Stosur | 6-0 6-3 |
| 2014-08-04 | Montreal | R64 | hard | Samantha Stosur | 6-2 6-2 |
| 2014-05-26 | Roland Garros | R128 | clay | Samantha Stosur | 6-1 6-1 |
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 (95 vs 112). ATP, WTA & Challenger.