Defending champion Jannik Sinner raced into the Australian Open semi-finals on Wednesday in imperious fashion after Iga Swiatek was equally ruthless to close on a first Melbourne crown. Italian world number one Sinner swept aside an out-classed home hope Alex de Minaur 6-3, 6-2, 6-1 to silence Rod Laver Arena and set up a meeting with 21st seed Ben Shelton. The other semi-final is between 10-time Australian Open champion Novak Djokovic and world number two Alexander Zverev, with both taking place on Friday.