Experience triumphed over youth as Australian Sam Stosur and Zhang Shuai of China beat Americans Coco Gauff and Caty McNally 6-3, 3-6, 6-3 in a tightly fought US Open women's doubles final on Sunday. The duo, who also won together at the Australian Open in 2019, produced a near-flawless first set with just two unforced errors, compared to 10 from …