Jenson Button was also on softs.

Raised cheek bones? Check.

Slightly squinting eyes? Check.

The tell tale signs of a smile. It can only be Daniel Ricciardo.

There's been a few more times put on the board - Carlos Sainz records a 1:27.849 on the soft tyre, putting him third, while Jenson Button is up and running with 1:32.552 - the sixth fastest time.

Andrew Benson
Chief F1 writer

Sauber became the last team to run its 2016 car own Tuesday and the C35 ran an impressive 103 laps on its debut. 

It was not especially fast, but Felipe Nasr said he was encouraged by his first taste of it. 

“To have clocked that amount of laps on the first day is quite impressive as you normally expect there to be more things that need to be fixed,” the Brazilian said. 

“It was a smooth day overall and though there were some small issues, they were nothing major. The early impression was quite good. It felt like a step forward from last year in terms of the chassis, engine and gearbox. It felt like we had a step forward on everything."   

F1 journalist Dan Knutson in Barcelona: "Marcus Ericsson paused to sign some autographs on his way to driving the 2016 Sauber C35 for the first time."

Valtteri Bottas and Kevin Magnussen come to the party. 

Bottas' first timed lap is a 1:29.487, momentarily putting him second before the K-Mag records a 1:27.554 to take his place.

Lewis Hamilton, meanwhile, is tweeting selfies from his cockpit (not while driving, of course).

Improvements for both Sebastian Vettel and Lewis Hamilton, but it is the Ferrari who stays out in front. Vettel clocks 1:26.978, while Hamilton makes a small gain with 1:30.113.

We've also had Carlos Sainz and Esteban Gutierrez out on the circuit this morning, completing an install lap before heading back in.

Feel free to join in #f1testlapgame

Sebastian Vettel's first timed lap sees him round in 1:28.619 before he improves with 1:27.431. Both Vettel and Hamilton's times have come on the medium compound tyres.

Out goes Lewis Hamilton and the world champion swiftly clocks the first timed lap -a 1:31.198 before shaving two tenths of a second off that time with his next effort.

Hamilton spent his time on the track yesterday working on a race run. Some quick laps on the agenda today?

Andrew Benson
Chief F1 writer

It has been a torrid past year for McLaren and engine partner Honda, but is a light emerging at the end of the tunnel? Fernando Alonso was third fastest on Tuesday. OK, that was still 1.7secs off the Mercedes, but it’s a major step forward from where McLaren were last year. 

Dig a little deeper, and the picture continues to look promising. Correcting the times for our best knowledge of fuel and tyres, Alonso was equal fourth quickest with Valtteri Bottas’s Williams, behind the two Mercedes and Kimi Raikkonen’s Ferrari. 

Analyse the sector and speed-trap times and the McLaren chassis continues to look very impressive. Alonso was second fastest to Nico Rosberg in the twisty final sector; third fastest in sector two that comprises the middle part of the lap and the back straight; and recorded the third fastest speed at the first sector line - which is after the 150mph Turn Three and just before the braking for Turn Four.

The engine’s power output is still obviously a problem - the McLaren was slowest of all at the finish line and second slowest at the end of the pit straight. But at least things appear to be going in the right direction.

Image source, Getty Images

It was a good day to be a McLaren fan yesterday.

After a worrying Friday when a water leak problem resulted in the car spending almost the entire day in the garage, the team was able to gather 93 laps worth of data on their updated Honda power unit on Tuesday.

"It's too early to tell a real difference compared to the engine last week, as we focused on shorter runs and adjusting the balance and set-up of the car," said Fernando Alonso, who was in the car yesterday.

"However, a full day of running has been a good start to the second test, and has provided us with lots of useful data that we can analyse overnight before Jenson continues the programme on Tuesday."

Ferrari's Sebastian Vettel is out nice and early, swiftly followed by Valtteri Bottas in the Williams and Jenson Button, who has taken over from Fernando Alonso in the McLaren. 

All three complete an installation lap before heading back in.

We know it is only testing, but I'd imagine a fair few of you are starting to get an idea in your head as to what the likely order of the field will be for this season.

My prediction?

Mercedes - Ferrari - Williams - Force India - Toro Rosso - Red Bull - Renault - McLaren - Sauber - Haas - Manor.

How do you see it shaping up? Let me know via #bbcf1,, external text in on 81111 (UK only) and you can also post a comment on the BBC Sport Facebook page.

Andrew Benson
Chief F1 writer

What do the drivers say about the relative pace of the top cars? Well, as ever in testing, they are doing little to clear the muddy waters. 

Nico Rosberg said he thought it was “very close” between Mercedes and Ferrari. Kimi Raikkonen gave nothing away. “I think we have a good package but is it good enough? Time will tell,” he said. Thanks, Captain Obvious.

Meanwhile, Williams driver Valtteri Bottas said: "At the moment it looks like Mercedes are in a really strong position.” 

Pushed to commit, most people would go with Bottas’s view at this stage.

Before we completely switch focus to today's on-track action, here's a reminder of who did what on Tuesday.