Zheng stages another stunning comeback to knock Swiatek out of the US Open
US Open LIVE: Tien facing Khachanov, Zverev and Gauff to come
US Open: Pegula, Tiafoe & Navarro defend home turf, Shelton takes down Tsitsipas
Zverev & Swiatek eyeing last eight at US Open as Osaka faces Rybakina in blockbuster
