Finally we get a tiny glimpse of who might be where in 2016.

Very impressive from the Toro Rossos, with Carlos Sainz and Max Verstappen fourth and sixth respectively - best of the rest behind Mercedes and Ferrari.

The McLaren were in touch with the top 10 with Fernando Alonso and Jenson Button 11th and 12th respectively, 1.6s off Lewis Hamilton's pace. 

Tom Clarkson
BBC Radio 5 live pit-lane reporter in Melbourne

"I think it is very difficult to predict what will happen in qualifying. We have these new rules but I think if the big teams get it right they should make it through to Q3 and we will see their true form. Q1 will be very interesting."

1) Hamilton 2) Rosberg 3) Vettel 4) Sainz 5) Raikkonen 6) Verstappen 7) Bottas 8) Ricciardo 9) Massa 10) Perez 

11) Alonso 12) Button 13) Kvyat 14) Ericsson 15) Magnussen 16) Hulkenberg 17) Palmer 18) Gutierrez 19) Grosjean 20) Nasr 21) Wehrlein 22) Haryanto

So it is a Mercedes one-two at the end of final practice, Lewis Hamilton fastest ahead of Nico Rosberg, but Sebastian Vettel, third fastest, is in close attention.

Sebastian Vettel plants a couple of wheels on the grass on the outside of Turn 15 and, if he was on a fast lap, that's been ruined now.

Meanwhile, Carlos Sainz vaults up to fourth with 1:26.257. That's just six tenths of a second off Lewis Hamilton's pace. Impressive from the Toro Rosso!

Lewis Hamilton's second lap on the super soft isn't as quick as his first run on them. Into the final four minutes and the top five is:

1) Hamilton (1:25.624) 2) Rosberg (+0.176) 3) Vettel (+0.228) 4) Raikkonen (+0.811) 5) Bottas (+1.106).

Image source, Getty Images

Less than three tenths of a second separating the top three.

Tom Clarkson
BBC Radio 5 live pit-lane reporter

"This is what we need in Formula 1 this year!"

Bosh!

The Mercedes pair go fastest, with Lewis Hamilton leading the way with 1:25.624 but there is not much in it at all between them and Ferrari.

Hamilton is 0.176s quicker than Nico Rosberg, with Sebastian Vettel just 0.228s off Hamilton's time.

Have Ferrari indeed closed the gap?

Lewis Hamilton is back out, Nico Rosberg is also switching to the super softs.

Twelve minutes to go, qualifying simulation time.  

Let the battle of pace between the Mercedes commence.

Image source, Getty Images

Jennie Gow
BBC Radio 5 live pit-lane reporter

"They are putting on the super-soft tyres and emptying the fuel out of Lewis Hamilton's car - this is going to be a fast lap."

Plenty are reaching for the red boots now, Ferrari among those bolting on the supersofts. Kimi Raikkonen goes second fastest with the red walled tyres on, clocking 1:26.453, before Sebastian Vettel goes fastest of all with a 1:25.852.

Meanwhile, Lewis Hamilton is back in the pits and getting super softs bolted on...