US Open LIVE! Scores, updates, news, results and video with Aryna Sabalenka and Frances Tiafoe in action in New York

Watch matches live on Sky Sports Tennis and Sky Sports+; defending women's champion Aryna Sabalenka faces Linda Noskova in quarter-finals; Frances Tiafoe then takes on Alex Michelsen in all-American last-eight clash in men's singles; US Open runs until Sunday September 13