US Open 2019: Jamie Murray, Bethanie Mattek-Sands retain mix doubles title
The British-American pair stormed through the last five games of the opening set, with Murray knocking off a backhand volley winner to give them the early advantage.
The British-American pair stormed through the last five games of the opening set, with Murray knocking off a backhand volley winner to give them the early advantage.
Stephens, who won her first WTA title at Washington in 2015, fired her sixth ace on her first match-point chance to advance after one hour and 53 minutes.
Hot weather and little rain have left surfaces stripped of grass after just five days of the tournament.
The United States-Czech pair tamed unseeded Australians Ashleigh Barty and Casey Dellacqua in the final.
