哈哈哈，奔驰冠军，奔驰冠军，奔驰冠军！

It's Mercedes-Mercedes-Ferrari-Ferrari but the order continues to change ever so slightly.

Lewis Hamilton now has a fastest lap of the morning, a 1:05.525 which is already four tenths quicker than the P1 time of last year. That means he's two tenths clear of the leading Ferrari.

Kimi Raikkonen is fourth, but 0.371s off the pace.

Eek - that was close! Nearly a pit-lane crash as McLaren release Stoffel Vandoorne right in front of Sebastian Vettel's Ferrari.

"Did you see that?" a miffed German asks his team.

Could McLaren be penalised for an unsafe release?

A few drivers are reporting spots of rain, but it must be rather thin as drivers continue to improve.

Daniel Ricciardo is one of those, but he's still 0.467s off the Mercedes pace in sixth.

Max Verstappen has leapfrogged Raikkonen into fourth, meanwhile, though he is on supersofts compared to his team-mate's softs.

Vettel, we should add, has gone third quickest, but only on the ultrasofts. Mercedes have set the pace so far on supersofts.

Stoffel Vandoorne and McLaren are under investigation of the race stewards for that unsafe release.

Fernando Alonso, meanwhile, is just getting his programme up and running for the day..

And a 'moment' for Max Verstappen who has spun in his Red Bull - but no damage done

Meanwhile, a really decent lap from Daniel Ricciardo on the soft tyres and the the Red Bull goes second fastest, less than a tenth behind Hamilton

"I think the front wing is hanging off," says Stoffel Vandoorne as sparks fly off his McLaren. He certainly seems to be dragging it.

He's not the ideal session so far, is Stoffel!
Replays show he chipped his nose, quite severely, when running wide at the final corner.

"I think the front wing is hanging off," says Stoffel Vandoorne as sparks fly off his McLaren. He certainly seems to be dragging it.

He's not the ideal session so far, is Stoffel!
Replays show he chipped his nose, quite severely, when running wide at the final corner.

It seems Pierre Gasly has just done similar as he heads back to the pits, too.

VAN的鼻子断了。。

It looks as if the front-wing failed after Vandoorne ran wide through the final corner.

A simple case of 'don't run wide' or a too severe penalty?

阿隆索这是怎么了？

Just to stress the tyre compounds used by the top six for their fastest times so far:

Hamilton - supersofts

Ricciardo - softs

Bottas - supersofts

Verstappen - supersofts

Vettel - ultrasofts

Raikkonen - ultrasofts

Robert Kubica has completed 15 laps for Williams this morning, one more than Lance Stroll, and he trails the Canadian by a couple of tenths so far.

Both drivers are around two seconds off the pace, a sign of Williams' struggles.

They're not at the bottom of the timesheets - that, er, honour goes to Fernando Alonso who isn't having a fun morning.

Lewis Hamilton and Valtteri Bottas have now bolted on the ultrasofts with an immediate dividend as Hamilton goes three tenths clear of Bottas at the top of the charts

Valtteri Bottas went purple through the final sector with his ultrasoft-shod flier, but he's still a couple of tenths off Hamilton.

These Mercedes upgrades seem to be working their magic immediately...

谁能解释迈凯伦怎么了？赛季初可是中游集团的领跑者呀