Seven-time champion Novak Djokovic is again the man to beat in Melbourne after he reached his 11th Australian Open quarter-final with a straight sets victory over Argentine Diego Schwartzman on Sunday.
Roger Federer is also making smooth progress, beating Hungarian Marton Fucsovics in four, setting up a quarter-final meeting with American Tennys Sandgren.
In the women's draw, top seed and home favourite Ash Barty survived a scare to beat Alison Riske in three and set up a repeat of last year's quarter-final against seventh seed Petra Kvitova.
RNZ correspondent Dave Worsley is at the Grand Slam in Melbourne.
