Sinner probably should have won in straight sets.
That is how strong the Italian played against the top-seeded Djokovic.
Djokovic had no answer for the No. 4 seed in the first two sets, as he managed to win just three of 15 games.
The 10-time Australian Open champion fought his way back into the match in the third set, but even that looked like a struggle against the in-form Sinner.
Djokovic earned a third-set tiebreak victory, but he could not match Sinner's level in the fourth set.
The loss was Djokovic's first defeat in Melbourne since the 2018 fourth round. He won the previous four Australian Opens he participated and did not play in the 2022 event.
Sinner entered Melbourne with five Grand Slam quarterfinal and one semifinal appearance, but he had not earned the breakthrough into the championship match.
Sinner comes into the final against Medvedev with a single dropped set, the third set against Djokovic, across six matches.
The Italian may not be favored against the No. 3 seed, but he should have a decent chance of capturing the title.
