Sabalenka battles past Townsend to set up Noskova US Open quarter-final

<ul><li><p>Reigning champion beats Townsend in straight sets</p></li><li><p>Linda Noskova defeats Marta Kostyuk 7-5, 5-7, 6-4</p></li></ul><p>Aryna Sabalenka’s US Open title defence continued to gather steam as she returned t