Iga Swiatek is free to focus on her Australian Open campaign after the World Anti-Doping Agency decided against lodging an appeal in her doping case.
Alex de Minaur has become the first Australian man since 2015 to reach the Open quarter-finals with a straight-sets win over rising American Alex Michelsen.
Jannik Sinner has kept his Australian Open title defence alive with a hard-fought win over Denmark's Holger Rune while Gael Monfils retired against Ben Shelton.