Novak Djokovic was booed off court by some Australian Open fans after retiring injured from his semi-final against Alexander Zverev.
Djokovic, who was bidding for a record-extending 11th title, quit after losing the first set 7-6 in 80 minutes.
The 37-year-old Serb had his upper left leg heavily taped after injuring it in Tuesday’s quarter-final win over Carlos Alcaraz.
Meanwhile, Jannik Sinner will face Zverev in the final after the defending champion saw off Ben Shelton in straight sets in Melbourne.
World number one Sinner recorded a 7-6, 6-2, 6-2 victory over American Shelton on Rod Laver Arena – the stage where he claimed his first major title 12 months ago.