Image source, Getty Images

Lewis Hamilton seized the advantage on Friday afternoon, as he has done in the last few races, finishing a massive eight tenths clear of the field.

That's not representative of the gap to team-mate Nico Rosberg, who made a mistake on his final flying lap, but will no doubt give him confidence ahead of qualifying tomorrow.

Can Rosberg respond on Saturday? I'll see you then to find out.

So that's it for track action today. Final practice starts at 09:00 BST, with the live text resuming at 08:30. Qualifying follows at 12:00.

Kayleigh Gray: Another beautiful session for @McLarenF1 fingers crossed for a good weekend from them!

PhilSlocombe: No surprise that Lewis is at the top; real champions can find that extra speed when they need it.

For the latest news, keep across the F1 pages, our Twitter feed @bbcf1 and watch Inside F1 on the BBC News Channel at 18:45 BST.

Here's Andrew Benson's developing second practice report which will be updated later with video highlights of that session.

Image source, Getty Images

"We'd expect to be up with McLaren, Williams and Ferrari" says Red Bull boss Christian Horner, whose drivers Sebastian Vettel and Daniel Ricciardo finished ninth and 13th fastest respectively.

"The drivers are not saying there's anything particularly wrong with the car, but it doesn't seem quite quick enough."

It's all very close between Kevin Magnussen in second and Felipe Massa in seventh. They are separated by just a quarter of a second.

Lewis Hamilton, though, is way out in front with a lead over eight tenths of a second.

BBC F1's Tom Clarkson reports that Pirelli engineers were very quick to cover up a tyre taken off Jenson Button's car, where a flatspot had worn it down to its canvas.

1) Lewis Hamilton 2) Kevin Magnussen 3) Fernando Alonso 4) Nico Rosberg 5) Valtteri Bottas 6) Jenson Button 7) Felipe Massa 8) Daniil Kvyat 9) Sebastian Vettel 10) Jean-Eric Vergne 11) Kimi Raikkonen

12) Nico Hulkenberg 13) Daniel Ricciardo 14) Sergio Perez 15) Adrian Sutil 16) Romain Grosjean 17) Pastor Maldonado 18) Esteban Gutierrez 19) Marcus Ericsson 20) Max Chilton 21) Kamui Kobayashi.

Image source, EPA

Lewis Hamilton finishes quickest in second practice for the Russian Grand Prix.

The track is pretty busy, with 14 cars out on track. It'll be enough for a timed lap and also give the drivers an opportunity to do a practice start.

We're back under way, with three minutes of the session still to go.

When BBC F1 commentator Ben Edwards asks Red Bull boss Christian Horner what they think the problem is on Daniel Ricciardo's car, he replies: "I'll give you three guesses, no, one guess." Ben replies: "Power unit failure?"

"Yes," says Horner, "In fairness, that power unit was right at the end of it's life. Unfortunately, it's missed six and half minutes of use."

Red Bull have had a number of problems with the Renault power unit this season.

The session has been red-flagged with Daniel Ricciardo's smoking Red Bull parked up at Turn 12.

Daniel Ricciardo's Red Bull rolls to a halt. "I think she's gone," reports the Australian on team radio.

PhilSlocombe: McLaren looking stronger this weekend and could be challenging for the podium.

Image source, Getty Images

Jenson Button locks up and runs wide. The 2009 world champion reports a flat-spot and is then told to pit at the end of his lap.

McLaren's Jenson Button is told that his pace on the long run is good. He's in the 1m44s. His engineer asks how his tyres are performing. "OK," comes the response. Short and to the point.

Image source, Getty Images

Having said the order is unlikely to change, Fernando Alonso is clearly on a different programme as he's just gone third quickest with a 1:40.504, just over eight tenths off the pace.

Here's how they stand with 20 minutes remaining:

1) Ham 2) Mag 3) Ros 4) Bot 5) But 6) Mas 7) Alo 8) Kvy 9) Vet 10) Ver