The world number one committed just five unforced errors in a flawless display and moves into a first Melbourne final since 2016.
Nadal slays giant-killer Tiafoe, sets up Tsitsipas semi
He will face second seed Nadal in a 53rd career meeting and eighth in the final of a Slam.
In 2012 the pair contested the longest Grand Slam final in terms of time at the Australian Open when Djokovic edged an epic battle 7-5 in the fifth set after 5hr 53min.
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