British number one Jack Draper set up a likely US Open third-round tie with Carlos Alcaraz after beating Argentinian Facundo Diaz Acosta, but Katie Boulter fell to a frustrating defeat.
Draper, who enjoys playing on the American hard courts having made it to the fourth round in New York last year, was far too good for Diaz Acosta, winning 6-4 6-2 6-2.
