Novak Djokovic continued his bid for a record-extending 11th Australian Open title with a confident win over American 12th seed Taylor Fritz.
The Serb, seeking a 25th major to extend his lead to three over Rafael Nadal, won 7-6 (7-3) 4-6 6-2 6-3 in hot conditions to reach the semi-finals.
Top seed Djokovic, 36, has won his past 33 singles matches at Melbourne Park.
He will play either Italian fourth seed Jannik Sinner or Russian fifth seed Andrey Rublev for a place in the final.