A disappointed Sebastian Korda was forced to retire with a wrist injury during his Australian Open clash with Karen Khachanov, sending the Russian through to a second consecutive grand slam semi-final.
Reigning Wimbledon champion Elena Rybakina eased into the semi-finals of the Australian Open for the first time in her career with a straight-sets victory over Jelena Ostapenko.
As if his rivals needed any more reasons to fear him, Novak Djokovic is feeling a lot more confident about his chances of winning a 10th Australian Open title.
Novak Djokovic was firing on all cylinders as he dismantled home favourite Alex De Minaur to reach the quarter-finals of the Australian Open for the 13th time.
Men's doubles pair Lloyd Harris and Raven Klaasen were knocked out in the third round at the Australian Open on Monday.
Aryna Sabalenka gave a statement of her intent at the Australian Open by powering past Belinda Bencic to reach the quarter-finals.