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Barcelona F1 test two day one
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Almost identical lap from Verstappen, who is building up quite a nice consistent run here. He's onto his 27th lap of the morning.
Meanwhile, Verstappen remains 0.811 off the ultimate pace, even though he's on the theoretically faster tyre; he's been relatively consistent, though, so perhaps Red Bull is working to another agenda, perhaps seeing how much mileage can be squeezed out of the new compound.
Another 1m21.1s from Bottas as Vettel returns to the pitlane in the Ferrari.
Verstappen marginally quicker than his previous lap next time by but still a couple of seconds off what he's already done this morning.
It'll be interesting to see how the Ferrari performs on the medium tyres, since Mercedes' one-lap pace on those earlier was pretty impressive.
Vettel rolls through and rejoins the track, as Bottas completes a lap 0.4s off his new best.
Vettel back in the pits, as Verstappen completes another lap that can be best described as 'a bit of a breather'.
So, both cars on soft tyres and Mercedes leads Ferrari by 0.022s. Hopefully that's a sign of things to come!
Bottas got there with a purple in sector 2.
Stopwatch
Now Bottas takes back P1! By just 0.022s, on a 1m20.631s.
Stopwatch
Vettel goes fastest! A 1m20.653s.
Personal best final sector from Bottas but he falls 0.002s short of improving overall!
Vettel through again with a very similar time to before (1m21.5s).
Verstappen picks up the pace but he's still 1.5s off his own best.
Bottas's first real lap on softs yields a 1m21.282s.
Verstappen's backed off but he's still circulating. Vettel laps around 0.8s slower then time round.
Vettel improves again, marginally, to a 1m20.888s. He's 0.132s behind Bottas now.
Verstappen improves to a 1m21.442s, still a little adrift of the top two.
Vettel pushes - and pushes hard. It's a 1m20.942s from the Ferrari driver, which sends him second, just 0.186s slower than Bottas.

We're really milking this 'a McLaren has broken down' thing now.
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Perez brings that run to an end and pits with 13 laps completed in total.
Bottas is back out and now on soft tyres.
Ericsson back in the pits in the Sauber. Vettel doesn't improve on his latest lap.
Verstappen's flying lap yields a 1m21.477s, which is a personal best but still 0.7s slower than Bottas.
An improvement from Perez, but not enough to get back ahead of Vettel. 1m23.548s from the Force India driver.
Vettel puts in his first lap of the day and goes third with a 1m23.268s on soft tyres.
Verstappen's first lap on this run is a modest 1m25.4s.
Perez posts a personal best in the final sector next time by but the overall lap isn't an improvement.
Perez's lap, on supersofts, is a second slower than his best so far. Verstappen stays out for a flier.

Fortunately for McLaren, we don't get as many chances to snap its car being wheeled back to the pits this year. So far...
Perez flashes past for a flying lap, as Verstappen (on ultrasofts), and Ericsson head out to join him.
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Here’s a recap of the opening hour, with the main headline being the very last act…
* McLaren suffers another early setback as Vandoorne stops on track on his second flying lap
* Bottas leads the way on a 1m20.756s, eight tenths clear of Verstappen’s Red Bull
* Mercedes and Bottas also top the lap count chart on 24
* Five teams yet to set a time: Toro Rosso, Ferrari, Haas, Sauber and Renault
* McLaren suffers another early setback as Vandoorne stops on track on his second flying lap
* Bottas leads the way on a 1m20.756s, eight tenths clear of Verstappen’s Red Bull
* Mercedes and Bottas also top the lap count chart on 24
* Five teams yet to set a time: Toro Rosso, Ferrari, Haas, Sauber and Renault
Perez heads straight back out in the Force India.
Green flag
Green flag, the session's back under way.

The Barcelona marshals and recovery crews are familiar with rescuing stricken McLarens from recent years
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This is the lap count after that red flag (ordered by the current standings):
Bottas 24
Verstappen 15
Perez 8
Sirotkin 9
Vandoorne 3
Gasly 8
Vettel 5
Magnussen 5
Ericsson 3
Hulkenberg 2
Bottas 24
Verstappen 15
Perez 8
Sirotkin 9
Vandoorne 3
Gasly 8
Vettel 5
Magnussen 5
Ericsson 3
Hulkenberg 2

A close up look at the broken-down McLaren
The gate in the pitwall has been opened up and the McLaren makes it back to the pitlane, though of course it's not under its own steam.
Looks like the McLaren doesn't need the recovery truck – it's been wheeled down the straight instead.
By: Geoff Creighton
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