Hosts Australia advanced to the quarterfinals of the United Cup with a 2-1 victory over defending champions United States. Matthew Ebden and Storm Hunter combined effectively in the decisive mixed doubles match to beat Jessica Pegula and Rajeev Ram 6-3, 6-1 in Perth and ensured that Australia finished top of Group C in the 18-country mixed-teams event with the Americans second. Alex de Minaur had provided Australia with a 1-0 lead by beating Taylor Fritz 6-4, 6-2 but Pegula responded by defeating Ajla Tomljanovic 7-6 (6), 6-3 to make it 1-1.