He'll now play Ben Shelton next week
Defending champion Jannik Sinner has thrashed home favourite Alex de Minaur at the Australian Open.
The Italian won in straight sets, to ease into semi-finals.
He'll play Ben Shelton next, who had a four-set victory over Italy's Lorenzo Sonego.
Iga Swiatek dropped just three games as she beat Emma Navarro of the USA.
Madison Keys will play the five-time Grand Slam winner in the last-four of the women's singles.
Keys battled past Elina Svitolina in three sets in their quarter-final.
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