– Big moment –
Federer fought off two break points in his opening service in the second set with pinpoint serves, while Cilic had a tussle before holding in the third game.
Cilic worked his way back into the match as both players traded furious forehands to stay on serve.
Cilic was break point down in the ninth, but crucially got out of it with a second serve ace down the middle followed by a forehand winner.
????????@rogerfederer joins @DjokerNole and Roy Emerson as the only men to win six #AusOpen titles. pic.twitter.com/LVTZXWJY2P
— #AusOpen (@AustralianOpen) January 28, 2018
The Croat had a big moment in the 10th game when two Federer double faults gave him set point, but a tentative backhand into the net and a wild backhand cost him his chance.
In the tiebreaker, Cilic got to two set points when his forehand clipped the line before a winning smash levelled the match as Federer dropped his first set of the tournament.
But Cilic lost serve on the back of a couple of ground stroke errors and Federer raced 4-2 up in the third set.
The defending champion shifted gears with a stunning forehand off his toes and confidently held serve to lead 5-2 before clinically serving out the set in 29 minutes.
Cilic was then broken in the opening game of the fourth set with a poor backhand dropshot into the net as Federer closed in for the kill.
But the Croat broke back in the sixth game with three break points when Federer netted and fought off a break point in the next game to put his nose in front.
Cilic was now more in the flow and broke Federer again with his big forehands starting to find their mark. He served it out to take the absorbing final into a fifth.
But Federer stayed calm and produced quality backhands to hold on to his serve amid mounting tension.
The world No.2 crucially broke to 2-0 and got a vital double break when Cilic netted a forehand, leaving him to serve out for the championship.
Hats off to Roger – A true sporting legend!!