Britain's Joe Salisbury and American Rajeev Ram remain on course to retain their Australian Open title after beating John Peers and Michael Venus to reach the men's doubles quarter-finals.
The fifth seeds saw off the 10th seeded Australian pairing 7-6 (7-4) 7-6 (7-4).
Britain's Jamie Murray and Brazil's Bruno Soares beat Argentina's Maximo Gonzalez and Italy's Simone Bolelli 6-7 (5-7) 6-2 6-4 to reach the last eight.
Heather Watson and Canada's Leylah Fernandez lost in the women's doubles.
They were beaten in the third round, losing 6-3 6-2 to the pairing of Canada's Sharon Fichman and Mexico's Giuliana Olmos.
Murray was in action again later on Monday as he and Bethanie Mattek-Sands faced the third-seeded duo of Canada's Gabriela Dabrowski and Croatia's Mate Pavic in the second round of the mixed doubles.
But Mattek-Sands and Murray were eliminated as Dabrowski and Pavic won 7-6 (9-7) 5-7 10-3.