Mariana Diaz Oliva defeated Bethanie Mattek Sands 6-4 6-3 in the US Open round of 128 on hard. The upset overturned the form book — Bethanie Mattek Sands came in defending last year's round of 128, but Mariana Diaz Oliva had been the form player, winning 2 of their last 7 on hard.
No previous meetings on record.
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 (19 vs 200). ATP, WTA & Challenger.