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Roger Federer celebrates winning championship point against Marin Cilic to win his sixth Australian Open title on Sunday night.

How Federer Won The 2018 Australian Open Final

The set-by-set account of Federer's record 20th Grand Slam triumph

Roger Federer beat Marin Cilic 6-2, 6-7(5), 6-3, 3-6, 6-1 to win his sixth Australian Open and 20th overall Grand Slam title after three hours and three minutes on Sunday night.

In a match of multiple momentum shifts, Federer joined Australia's Roy Emerson and Novak Djokovic of Serbia as a six-time champion in the 50th Open Era edition of the Australian Open.

Federer has become just the third man, after Ken Rosewall and Rod Laver, in the Open Era to win four or more Grand Slam titles after becoming a 30-year-old and now moves just 155 points behind World No. 1 Rafael Nadal in the ATP Rankings.

Federer improved to 9-1 lifetime against Cilic in their FedEx ATP Head2Head series, having also won their 2017 Wimbledon final clash. The Swiss hit 41 winners to Cilic’s 45, but it was his stronger service consistency – 67 of 84 first-service points won and 32 of 55 second-service points won – that ensured he was able to remain in contention, despite surges in match-momentum for Cilic. Federer also hit 24 aces to Cilic’s 16, converting six of his 13 break point opportunities on the Croatian's serve.

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ATPWorldTour.com breaks down how the Australian Open was won.

First Set 

Federer got off to a flying start under the roof on Rod Laver Arena, racing out to a 4-0 lead against Cilic, in what is a repeat of last year's final from The Championships at Wimbledon. Cilic netted a smash in the opening game to hand Federer the initiative and was broken again in the third game of the match after firing a backhand into the tramline. Cilic only managed to win four points in the first four games, and until winning the fifth game of the match was totally outrallied and outplayed by Federer. Sublime serving from Federer saw the 19-time Grand Slam champion lose just two points on serve all set as he cruised to a one-set advantage, sealed by another backhand error from his opponent.

Second Set 

Looking to respond quickly to the disappointment of losing the first set, Cilic held serve in the opening game and manufactured two break points on Federer’s serve. At 15/40, Federer fired down an ace out wide to save the first before unleashing on a run-around forehand down the line to level at deuce before holding for 1-1. Time and time again throughout the set, Cilic served his way out of tricky situations. The 6’6” Croat staved off single break points at 1-1, 2-2 and 4-4 to maintain his lead with two aces and an unreturned serve to keep Federer at bay. After comfortable holds through most of the set, Federer double faulted at 4-5 30/30 to hand Cilic set point, but the soon-to-be World No. 3 could not capitalise as he dumped a cross-court backhand into the net.

After Federer escaped for 5-5, two service holds would force the set to a crucial second-set tie-break. Federer made the first move with a rifled backhand, opening up the court for an easy winner to go ahead 3/2. But was immediately pegged back by Cilic, who hammered a forehand return for a winner to reach the change of ends back on serve. The decisive move came at 4/5 with Cilic hitting a backhand return at Federer’s laces, before hammering a looped ball into the corner off the forehand to set up two set points. On the second, the 2014 US Open champion banished the memory of his error in the opening game of the match to smash his way to a second-set success.

Third Set 

Set three was decided by one game. The sixth game was to be the only game of the set featuring break points, and it was Federer who grasped control of the final here. Cilic netted two groundstrokes and failed to control a Federer passing shot on the volley, to hand his opponent three break opportunities and Federer happily obliged at the second time of asking. The five-time champion stepped in on his backhand return, taking time away from his opponent to force another error and move ahead 4-2. Three games later, Federer closed out the set to love, with his 19th ace, to move to within a set of an incredible milestone victory.

Fourth Set 

After leading 30-0 in the first game, Cilic hit three errors to hand Federer an opportunity to seize immediate control. Federer sliced a short return to Cilic’s backhand wing and forced his opponent into a fourth consecutive error to inch even closer to his 20th Grand Slam title. Federer had a chance for a double break in the third game, but could do nothing to stop Cilic’s aggressive play on the forehand wing. The sixth seed pummelled a forehand winner down the line to stay in contact. Cilic threw caution to the wind in the sixth game, stepping up with more aggressive play to force Federer into errors, which led to getting back on serve. Two games later, Cilic threatened Federer’s serve again and crucially found another breakthrough. The 29-year-old attacked the Federer forehand and stepped into the court to dispatch a short reply for a winner, before serving out the set to love for his fifth consecutive game, sending the year’s first major to a final set.

Fifth Set 

Cilic’s big chance came in the first game with two break points on Federer’s serve, but the Croat failed to get either of his returns into play after strong Federer serving. After the relief of surviving his opening service game, Federer went on the offensive to break Cilic for a 2-0 lead with a deep cross court backhand return which Cilic ran around, but could only push into the net. From there, Federer surged to victory. A single love hold for Cilic in the fourth game was the only interlude to the charge of Federer. who won 12 of the last 13 points and sealed the title, for the second successive year on a Hawk-Eye challenge, with an unreturned serve out wide.