US Open: Coco Gauff, Iga Swiatek begin title bids as Jannik Sinner launches defence

Jannik Sinner commenced his US Open title defense with a dominant victory, while Iga Swiatek and Coco Gauff initiated their campaigns strongly. Sinner, aiming to be the first to retain the title since 2008, dismissed concerns about his recent illness. Swiatek and Gauff, former champions, also secured comfortable wins, setting the stage for an exciting tournament.