Postpublished at 11:36 Greenwich Mean Time 28 January 2018
*Federer 6-2 6-7 (5-7) 6-3 3-6 5-1 Cilic
Roger Federer soars to a 30-0 lead. He's two points away...
Roger Federer wins 2018 Australian Open
Beats Marin Cilic 6-2 6-7 (5-7) 6-3 3-6 6-1
Federer first man to win 20 Grand Slam titles
Swiss also secures record-equalling sixth Australian Open title
Roof was closed - extreme heat policy
Alex Bysouth
*Federer 6-2 6-7 (5-7) 6-3 3-6 5-1 Cilic
Roger Federer soars to a 30-0 lead. He's two points away...
Russell Fuller
BBC tennis correspondent at Melbourne Park
As we look around the Rod Laver Arena, we see a crowd getting very excited about Federer winning a sixth Australian Open title.
Many are on their feet, with Swiss flags, and faces painted.
*Federer 6-2 6-7 (5-7) 6-3 3-6 5-1 Cilic
Roger Federer just coaxes a backhand across the net, but Cilic attacks the short ball.
The Croat clips the tape - Federer breaks!
Federer 6-2 6-7 (5-7) 6-3 3-6 4-1 Cilic*
Snappy serve from Marin Cilic, but he then flings a backhand long. He'll challenge, but that's out.
Two break points.
David Law
Radio 5 live commentator at Melbourne Park
In Toronto 2010, after Federer had lost to Berdych at Wimbledon and stood on 16 Slams, I asked him if he would be happy with three more majors before retiring.
"No, I would want to win more."
Two games from doing it. Twenty Slams in sight.
Federer 6-2 6-7 (5-7) 6-3 3-6 4-1 Cilic*
We're approaching the three-hour mark of an intriguing final.
Roger Federer has found a new lease of life in this final set, engaging Marin Cilic and winning the rally before watching the Croat wrap a straightforward backhand against the post holding up the net.
0-30.
#bbctennis
Dennis Ethan: Mirka clenching fist-pumps is the best bit of the match I have watched today. Allez Roger!
Pat Cash
Former Wimbledon champion on BBC Radio 5 live
Federer's rhythm is so solid and it's been like that for 15 or 20 years. It's been the same all the time. The more you play under pressure with that technique, the better you get.
Cilic has been getting hold of some good returns but the more tight you get, you realise it might be the last opportunity.
Federer 6-2 6-7 (5-7) 6-3 3-6 4-1 Cilic*
Another corker of a serve from Roger Federer, wide out and rattling the racquet of an outstretched Marin Cilic to hold to love.
*Federer 6-2 6-7 (5-7) 6-3 3-6 3-1 Cilic
Every point feels like another step towards a 20th Grand Slam title for Roger Federer, he leaps into a 30-0 lead with a popping second serve and follows up with an ace.
*Federer 6-2 6-7 (5-7) 6-3 3-6 3-1 Cilic
The sixth seeds speeds to 40-0, nails another ace and holds to love.
New balls time...
Federer 6-2 6-7 (5-7) 6-3 3-6 3-0 Cilic*
Roger Federer takes on a bite to eat, a bit of energy between the change of ends.
Silence inside the Rod Laver Arena is only broken by the slapping sound of a punchy Marin Cilic ace.
30-0.
Russell Fuller
BBC tennis correspondent at Melbourne Park
The crowd told you everything you needed to know then.
Federer 6-2 6-7 (5-7) 6-3 3-6 3-0 Cilic*
Roger Federer fires a massive serve down the T to take advantage after Cilic had rattled back to deuce.
And the Swiss sees out his service game. A huge hold.
*Federer 6-2 6-7 (5-7) 6-3 3-6 2-0 Cilic
What a reach from Marin Cilic! He somehow gets to a Federer drop shot, gives the Swiss the eyes and pops it down the line.
But it's from the sublime to the outright infuriating for the Croat, who misjudges a forehand.
40-30.
#bbctennis
Dom Breslin: Need to leave to referee a Rugby League match in 15 mins. Please Roger - no more drama.
*Federer 6-2 6-7 (5-7) 6-3 3-6 2-0 Cilic
Nervy stuff out on Rod Laver Arena.
Roger Federer's defence is on form, and that's forcing Marin Cilic into mistakes.
15-15.
Russell Fuller
BBC tennis correspondent at Melbourne Park
Mirka Federer looks a little bit happier than she did five minutes ago.
Marin Cilic looks a little bit more disgruntled than he did five minutes ago.
*Federer 6-2 6-7 (5-7) 6-3 3-6 2-0 Cilic
Federer breaks.
He fizzes in a return with great depth that Cilic can't deal with, and it pops into the net.
Federer 6-2 6-7 (5-7) 6-3 3-6 1-0 Cilic*
Federer is challenging a kicking second serve from Cilic, that looked close... but it's long!
Break point.