Tommy Paul got the better of fellow American Ben Shelton to reach his first grand slam semi-final at the Australian Open.
Aryna Sabalenka will take on surprise package Magda Linette in the semi-finals of the Australian Open.
Two-time former champion Victoria Azarenka ended a 10-year wait to return to the Australian Open semi-finals with a straight-sets victory over Jessica Pegula.
Novak Djokovic says accusations from critics that he is "faking" his hamstring injury are only adding to his motivation to win the Australian Open title.
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.