Neal Skupski and Desirae Krawczyk beat Jamie Murray and Taylor Townsend
Skupski and Krawczyk have won the past two Melbourne mixed doubles titles.
Skupski, 33, plays in the men’s doubles quarter-finals on Wednesday.
He and Dutch partner Wesley Koolhof are the top seeds in the draw and take on
Australian wildcards Rinky Hijikata and Jason Kubler.