Pat Cash
Former Wimbledon champion on BBC Radio 5 live

If you're not hitting the exact shots from the very first ball, before you know it you're down.

But Cilic is hitting some nice heavy hits on Federer's backhand now.

Roger Federer's serve just gets better with age, the first a blistering, wrist-cracking number off the strings.

But what's this? A Cilic comeback? He gets to grip with Federer's punch and powers into a 15-40 lead to earn two break points.

Ademolu: I think #Federer has an appointment in maybe an hour. At this rate this could be over in an hour and a half.

Jimmy: Everyone is playing Tennis. Roger Federer is playing Chess.

Obbbbbbby: At this rate the highlights programme could show the whole match and still be shortened :)

That brings us nicely to a plug for the highlights. Catch them on 13:00 GMT on BBC Two.

Federer finds a way into the point off Cilic's second serve, moving his opponent around the court before the sixth seed drops a backhand short.

Cilic attacks off the next point though, and Federer goes high and wide in an attempt to loop a lob over the looming figure at the net.

Image source, AFP

Set one done and dusted in 24 minutes, how can Marin Cilic respond?

Pure speed off the racquet from the 6ft 6in Croat's serve, he's come out firing.

40-0.

Image source, AFP

Wonder who she's here to support?

Image source, EPA

That winner just seemed to anger Roger Federer... he responds with a couple of cracking serves to seal the first set.

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Punchy, aggressive and uncontrollable from Federer, who forces Cilic to go long.

But that's wonderful from the Croat, a superb passing forehand with Federer running towards the net - 30-15.

Roger Federer has only lost one point on his serve so far... now he's serving for the first set after 23 minutes.

Image source, EPA

Pat Cash
Former Wimbledon champion on BBC Radio 5 live

Roger doesn't want Cilic to settle and getting into some longer rallies will help Cilic settle.

Federer miscues a backhand slice and it clips the net, dropping on his own side of the court.

His next backhand is short, too - that's the hold for Cilic.

Not quite 20 minutes into the Australian Open final and Marin Cilic is serving to stay in the first set.

Boom, boom. A couple of big serves from the sixth seed take him to 30-0.

Image source, AFP

Pat Cash
Former Wimbledon champion on BBC Radio 5 live

Roger hasn't done an awful lot, to be honest. He just does what he does.

We can expect one unreturnable serve from Federer. That and is backhand are the things he's improved the most.

The Swiss follows his first ace of the match with a fierce second serve that Cilic can only coax back into the guts of the net.

Federer holds.

Not a bead of sweat on Roger Federer, he's only playing an Australian Open final in searing heat and humidity.

Marin Cilic, meanwhile, has already been through more towels than a launderette.

Federer cruises to 40-0 on his service game. This is punishing.

Piers Newbery
BBC Sport at Melbourne Park

The roof might be closed but it’s still pretty toasty in Rod Laver Arena - hopefully Federer will ask for the air conditioning to be turned up for the spectators as he apparently did in his last match. We’re all living in Roger’s world here tonight, especially Cilic.

Image source, EPA

Big, powerful strokes from Marin Cilic, who waltzes into the net to slam home a drifting slice from his opponent.

The Croat takes his first game of the final.

Image source, AFP

Well, Cilic hasn't got his eye in yet... he needs to find it quick.

Another looping backhand drops well wide of its target, and the 2014 US Open champion follows up with a double-hander into the net after being given the runaround by Federer - 30-30.

Image source, AFP

David Nicholson Hirst: Federer seems to have sweat gland issues, anyone ever seen the guy sweat?

GTfan142005: This is a complete mismatch.