
Defending champion Aryna Sabalenka was pushed to the limit in setting up an Australian Open showdown with teenager Mirra Andreeva on Friday but Naomi Osaka's run ended with an injury retirement in round three.
Also on day six in Melbourne, Carlos Alcaraz dropped a set before surging into the last 16 and Alexander Zverev staked his claim for a first major title with a third straight-sets victory.