Monica Puig defeated Bethanie Mattek Sands 3-6 6-2 6-2 in the Sydney qualifying round 1 on hard. The upset overturned the form book — Bethanie Mattek Sands came in leading the head-to-head 2–1, but Monica Puig had been the form player, winning 2 of their last 7 on hard. Monica Puig narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-12-31 | Auckland | R32 | hard | Monica Puig | 6-3 6-2 |
| 2013-07-29 | Carlsbad | R32 | hard | Bethanie Mattek Sands | 2-6 6-1 6-2 |
| 2013-03-18 | Miami | R128 | hard | Bethanie Mattek Sands | 6-4 7-5 |
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 (49 vs 40). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About