Second seed Rafael Nadal eased past unseeded American Frances Tiafoe to reach the Australian Open semi-finals and continue his bid to win all four Grand Slams for a second time.
The 32-year-old Spaniard cracked 29 winners in a 6-3 6-4 6-2 victory.
Nadal broke 21-year-old Tiafoe in each of his first service games of the set.
The 17-time Grand Slam champion will play Stefanos Tsitsipas in the last four after the 20-year-old Greek beat Spain's Roberto Bautista Agut.
Tsitsipas followed his last-16 victory over defending champion Roger Federer with another four-set win on Tuesday.
Nadal, who did have to stave off two break points at 2-1 in the second set, has not dropped a set as he aims to become the first man to win each of the four Grand Slams twice in the Open era.