Hamilton on pole, Bottas 2nd, Vettel 3rd
Big gap from Hamilton to Vettel - seven tenths of a second
Brit Norris 8th for McLaren
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Chris Doherty: In my 20 years of watching f1 this appears to be tightest the field has been, as a McLaren fan this could make it a long season.
Jeroen: Eighteen cars within a second. Niiiice. And Kubica is nowhere.
Nick Allflat: I like this new F1, it's not predictable as hell anymore
We're seeing some impressive performances from our younger drivers here, including Antonio Giovinazzi and Daniil Kvyat who have appeared on the F1 grid before, but not for a while.
And of course Charles Leclerc in that Ferrari. Plus, that Alfa Romeo is quick.
It's a Leclerc sandwich as it stands
Image source, Getty ImagesJennie Gow is with George Russell in the Williams garage, he says: "I'm proud of myself to be honest, we all know where the car is at and we need to push forward - my only comparison is Robert.
"I can leave here with my head held high. We're not doing anything silly we're just gathering data because we're still so far behind."
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PaulGawneF1: Wow times were tumbling like a fruit machine in this last couple of mins.
Martijn Kosters: Get in there Charlie!
Amit Mandalia: Apart from the Williams, I can’t see who else may not get of Q1 & the final places in Q3 seem pretty open (assuming Ferrari, Mercedes & Red Bull safely make it through) so this is going to be an exciting Qualy!
Image source, Getty ImagesHamilton, Vettel and Leclerc are out first for Q2.
McLaren have been fined 5,000 euros (£4,300) for an unsafe release of Lando Norris into the path of Robert Kubica.
(Anyone who has seen the Netflix Original series - Formula 1 - Drive to Survive, will understand.)
Image source, Getty ImagesNot a great show for Max Verstappen and Pierre Gasly. Both drivers didn't go out for a second run, and Gasly didn't even scrape through.
Jack Nicholls
BBC Radio 5 Live F1 commentator
"George Russell was ahead of Robert Kubica, although that wasn't hard given Kubica drove into the wall. That's the second time in a day Kubica has had a spacial awareness, er, mistake."
Image source, Getty ImagesKubica has hit the wall, for the second time today, but a different wall.
He punctured and went across the grass to head back to the pitlane.
Our Q1 top 10:
Drop zone:
16. Stroll
17. Gasly
18. Sainz
19. Russell
20. Kubica
Image source, EPAJack Nicholls
BBC Radio 5 Live F1 commentator
And there he goes to cut the timing beam, does he close in on Lewis Hamilton? No. No he didn't.
With four minutes to go
Daniil Kvyat has been looking promising through pre-season testing and our practice sessions. Perhaps he can escape Helmut Marko's driver guillotine this year.
Third time lucky and all that.
Image source, Getty Images
Image source, Getty ImagesFor those who have seen James Bond films from the 1960s - you get what we mean, yeah?
Lando Norris and the two Williams are out on flyers.
So far we have a huge margin:
Image source, Getty ImagesTweet us at #bbcf1
Ronald Sebuhinja K: All the sandbagging and bluffing stops...NOW!
Roxy: Successfully stayed awake through the night for qualifying. It better be a good one.
Jeremiah Kariuki: Are Mercedes going to upset the pundits apple cart? Or Have Ferrari been hiding their speed? We are just about to see that. Going for Hamilton, Vettel and Bottas in that order for Pole position.
Jeroen: I’m calling it: Williams WILL make the 107%.
Image source, Getty ImagesAnd we're off for Q1. This is it, no more sandbagging!
Image source, Getty Images"And then you grab the udder like this, and milk comes out."
Andrew Benson
BBC Sport’s chief F1 writer in Melbourne
Sebastian Vettel likes a cheeky line and he calls this the time: "You pull your pants down and show everyone what you've got".
Usually, it's Lewis Hamilton who makes the biggest impression on a Saturday afternoon, and he has topped all three practice sessions. But do Ferrari have something up their sleeves? This is the moment of truth.