Two green cars have entered stage left.

Fernando Alonso and Lance Stroll have been sent out on the medium tyres by Aston Martin.

A few set-up adjustments for Sergio Perez in the Red Bull garage. Not that any one is rushing to get out onto the track.

The Mexican driver beat Charles Leclerc to take his first Formula 1 pole position at the Saudi Arabian Grand Prix last year.

I think we're all ready here. Shall we do another hour of practice?

BBC Radio 5 Sports Extra

We have a new voice in the commentary box today.

Jack Nicholls is joined by British racing driver Alice Powell for qualifying and Sunday's grand prix.

BBC Sport's chief F1 writer Andrew Benson is also on hand to keep us updated.

Coverage is online-only for today's sessions and is available via the audio icon at the top of this page.

Quite a few drivers have been subject to speculation with regards to not being happy with their team's performance and possible moves elsewhere.

With dreams of an eighth world title still a big ambition for Lewis Hamilton, is Toto Wolff right? Will the 38-year-old have to look elsewhere if wants to become the greatest Formula 1 driver of all time?

Is there even another team he could go to?

Send us your thoughts on this using the hashtag #BBCF1 on Twitter. We'll get as many as we can in the page during both sessions.

Andrew Benson
BBC Sport’s chief F1 writer

Image source, Getty Images

Lewis Hamilton will have to consider leaving Mercedes if they cannot deliver a competitive car "in the next couple of years", his team boss says.

Toto Wolff said he was "absolutely confident" Hamilton would sign a new contract at Mercedes this year.

But he added: "Nevertheless, if he wants to win another championship, he needs to make sure he has the car.

"If we cannot demonstrate we are able to give him the car in the next couple of years, he needs to look everywhere."

Wolff added: "I don't think he's doing it at this stage. But I will have no grouch if that happens in a year or two.

"I don't think that Lewis will leave Mercedes. He's at the stage of a career where we trust each other, we have formed the great bond among each other and we have no reason to doubt each other, even though this is a difficult spell.

"But so nice it will be when we come out of this valley of tears, and come back to solid performances."

And he said that he and Hamilton were already well on the way to agreeing a new deal.

"We are talking about when we want to do it and how," Wolff said. "We just need to change some terms - the dates basically."

So both sessions were done and dusted without a hitch. Then came the post-practice quotes...

Only two tenths separated Max Verstappen and Fernando Alonso by the end of second practice.

Charles Leclerc finished ninth for Ferrari and was concerned over the team radio about an engine problem, to which the pit wall replied they couldn't see anything on the data that would be alarming.

Image source, Formula 1 Twitter

Image source, Getty Images

First prize was again awarded to the Red Bull of Max Verstappen as the sun made way for darkness in Jeddah but this time, Sergio Perez was relegated to third on the board as Fernando Alonso slotted into second place.

Mercedes' Lewis Hamilton finished 11th on the timesheets, 0.996secs off the pace, and said he had "struggled" in both sessions.

Esteban Ocon was fourth for Alpine, George Russell fifth for Mercedes and Ocon's team-mate Pierre Gasly was sixth.

Max Verstappen was only the driver to record a time in the 1:29s and was four tenths quicker than Sergio Perez. Lando Norris, meanwhile, ended the hour bottom of the pile in his McLaren.

Image source, .

Image source, Getty Images

Max Verstappen and Sergio Perez secured Red Bull a one-two in opening practice yesterday by topping the timesheets in the first hour in Jeddah.

Reigning world champion Verstappen set the pace, 0.489 seconds ahead of team-mate Perez, with Fernando Alonso’s Aston Martin third, 0.698secs off the Dutchman's marker.

Alonso’s team-mate Lance Stroll was fourth fastest, ahead of the Mercedes of George Russell and Lewis Hamilton.

During the session Ferrari announced that they had changed the engines on both cars “as a precaution” following Charles Leclerc’s failure in Sakhir.

Leclerc has a 10-place grid penalty for Sunday’s race after already exceeding his allocation of electronics control units because of two failures in Bahrain.

Welcome back if you were with us yesterday. A warm hello if you're joining us fresh for qualifying today.

The battle for pole position can be a dicey affair around the speedy Jeddah Corniche Circuit, so strap yourselves in for possible drama from 17:00 GMT.

One final practice session to get through. Green light is switched on at 13:30 GMT.

Full commentary of both sessions is online-only and available to listen to via the audio icon at the top of this page.

The story of a fairly routine Friday practice first of all...

Fernando Alonso split Max Verstappen and Sergio Perez during Friday's second practice session in Jeddah but can the Spaniard park his Aston Martin in the middle of the Red Bulls again for Sunday's Saudi Arabian Grand Prix?

Image source, Getty Images