Novak Djokovic moved a step closer to retaining the Australian Open title with a straight-set semi-final win over injury-hit rival Roger Federer.
Serbia's Djokovic was 4-1 and 40-0 down in the opening set before recovering to win the tie-break.
That laid the platform for the 32-year-old second seed to go on and win 7-6 (7-1) 6-4 6-3.
Djokovic, aiming for a 17th Grand Slam title, will face Dominic Thiem or Alexander Zverev in Sunday's final.
"The match could have definitely gone a different way if he had used those break points [in the sixth game]," Djokovic said.
"He started well - I was nervous.