In his celebratory speech, Djokovic reflected on his recovery following an elbow injury and a drop in form.
Djokovic needed just two hours and four minutes to annihilate Nadal, drubbing him 6-2, 6-3, 6-2 to win his seventh Australian Open. 'I have to work on my clay court game a bit more, more specifically than I have last season. Clearly, he did not budge from there, producing 34 winners and only nine unforced errors Sunday.
The Australian Open used their official Twitter to thank world number two Nadal.
It was nearly as if his recent track record on hard courts against Djokovic, which saw him lose 14 straight sets before the final, was playing on his mind and he was just not confident enough to replicate his strategy from the previous matches. He also won 25 of the first 26 points he served.
Nadal, at least when fully fit and firing, is Djokovic's only serious challenger at the big events, but too much time is spent by the Spaniard either injured or making his way back from injury.
Top-ranked Djokovic is aiming for a men's record seventh Australian Open title.
Nadal rallied to make it 4-3 before being closed out for the final two set points. After largely cruising in second with the occasional foray into third, the top-seeded Serb revved into fifth and turned on the turbochargers from the start of his final against great rival Rafael Nadal.
The way things went at the Australian Open didn't exactly teach the world that Novak Djokovic is the best there is in men's tennis right now. Only Fred Perry and Ellsworth Vines knew each other better on a tennis court than do Djokovic and Nadal; they played 162 times in the late 30s, barnstorming around the United States, the UK, Caribbean and South America in high-grade exhibition matches, with the American winning 88-74.
With his 15th major title, Djokovic grabbed sole possession of third place on the all-time list, passing Pete Sampras.
A calendar-year Grand Slam, something no man has done since Rod Laver in 1969: Why not?
The French pair beat Henri Kontinen of Finland and John Peers of Australia 6-4, 7-6 (1) in Sunday's final.
Four major titles in a row, something he already accomplished from 2015-16: Why not?
It follows triumphs at Wimbledon and the US Open previous year and has earned him the chance to aim for his second "Djoker slam" - holding all four major titles simultaneously - at the French Open, starting on May 26.
The Spaniard, who had not played a competitive match since the US Open before arriving in Melbourne, has rampaged through the draw without losing a game on his remodelled serve since the first round.
Djokovic left Nadal smirking or gritting his teeth or punching his racket strings, unable to compete at all. He looked as good as ever on the hard court throughout these few weeks.
For overall Slam match wins, the Big Three fill the top placings: Federer 342, Djokovic 265, Nadal 253.
After further baseline punishment, he broke Nadal for the fourth time, pulling him around like a puppet-master before tripping him up with another drop-shot.