Emma Navarro called for a change in the rules after a controversial moment during her Australian Open quarter-final loss to Iga Swiatek. The second seed continued her romp through the draw with a 6-1 6-2 victory to set up a meeting with Madison Keys.

Ben Shelton wore down Italian Lorenzo Sonego 6-4 7-5 4-6 7-6 (4) in a highlight-laden clash and ensured the United States has players in the men's and women's semi-finals for the first time since Andy Roddick and Serena Williams in 2009.