Power problem for Hamiltonpublished at 16:43 British Summer Time 28 October 2017
"We have some power issues," says Lewis Hamilton. Maybe this weekend is not going to be the formality for Hamilton to become world champion that we were all expecting.
Summary
Ferrari's Sebastian Vettel takes pole for Sunday's race
German's 50th pole position in F1
Red Bull's Max Verstappen second and Lewis Hamilton third
Bottas fourth and Raikkonen fifth
Hamilton can seal title on Sunday - needs to finish fifth
Power problem for Hamiltonpublished at 16:43 British Summer Time 28 October 2017
Verstappen leadspublished at 16:42 British Summer Time 28 October 2017
Another change at the top. This time the Red Bull of Max Verstappen takes the track record. His time is 1:17.223, slightly quicker than Vettel's best of 1:17.230.
Image source, Getty ImagesNew track record for Vettelpublished at 16:41 British Summer Time 28 October 2017
We were saying it was a bad day for Ferrari. Not any more.
Sebastian Vetten has just broken Valtteri Bottas' track record with a time of 1:17.230. Meanwhile, Kimi Raikkonen has jumped to third fastest to move Lewis Hamilton down to fourth.
Image source, Getty ImagesPostpublished at 16:36 British Summer Time 28 October 2017
A good day so far for... Renault. Carlos Sainz is fifth and Nico Hulkenberg is seventh.
A bad day so far for... Haas. Kevin Magnussen is 14th and Romain Grosjean is 15th.
Image source, Getty ImagesPostpublished at 16:33 British Summer Time 28 October 2017
For the world title race to go on for another race we need Sebastian Vettel to win tomorrow and Lewis Hamilton to finish outside the top five.
It has not been the best of days for Ferrari so far with Vettel fifth fastest and Kimi Raikkonen down in 10th. The Mercedes, remember, are first and second with Bottas leading the way.
Who will start at the front of the grid?published at 16:30 British Summer Time 28 October 2017
Think you can predict who will come out on top in qualifying? Prove it!
Head over to this page and select your top three on the grid - share it with us using #bbcf1 and explain your choice.
Make your prediction here. You don't have to put Daniel Ricciardo second, but it is an illustration of how it looks.
Image source, .get involved Get Involvedpublished at 16:28 British Summer Time 28 October 2017
#bbcf1
Jeremiah Kariuki: That's a new lap record by Bottas! He seems to be enjoying the #MexicoGP, external track. Should keep going that way and get the pole.
Positives for McLarenpublished at 16:28 British Summer Time 28 October 2017
Allan McNish
Formula 1 analyst on BBC Radio 5 live sports extraIn theory this should be a good weekend for McLaren. They have strong downforce and it's an agile car and with the changes in direction that will help.
If they can get track position in qualifying, once they're there they can stay there quite easily.
Note: McLaren will be due grid penalties for engine changes, with a 20-place penalty for Fernando Alonso and 35-place penalty for Stoffel Vandoorne.
Postpublished at 16:27 British Summer Time 28 October 2017
Valtteri Bottas is driving like a man who has a point to prove. He has broken his own track record set moments ago with a lap of 1:17.537. Four tenths of a second quicker than Lewis Hamilton.
Image source, Getty ImagesPostpublished at 16:26 British Summer Time 28 October 2017
"What was the problem with the tyres? Max Verstappen, on the super-softs, is asked.
"They don't work," is the very blunt response. He is third at the moment.
A one-stop race?published at 16:24 British Summer Time 28 October 2017
Tom Clarkson
BBC Radio 5 live sports extra commentator in Mexico CityYou can have unlimited running on ultra softs here in the race - possibly 35 laps so a one-stop race. Mercedes have brought more ultras than the other teams here which suggests why they are running on those in practice.
New track recordpublished at 16:23 British Summer Time 28 October 2017
No messing about from Valtteri Bottas, who has just set a new track record of 1:17.681, and it is a Mercedes one-two at the moment with Lewis Hamilton in second.
Postpublished at 16:21 British Summer Time 28 October 2017
It's not just the Mercedes cars that are dancing along. In very quick time Sergio Perez in his Force India and Carlos Sainz in his Renault both overshoot a corner and end up heading for a country drive over the grass.
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End of twitter postDancing on ultra softspublished at 16:20 British Summer Time 28 October 2017
Allan McNish
Formula 1 analyst on BBC Radio 5 live sports extraMercedes are using ultra soft tyres because they have significantly more of them - more than Red Bull.
Lewis Hamilton's car looks like it's dancing below him.
Postpublished at 16:20 British Summer Time 28 October 2017
Well, Sergio Perez was leading, but he is now down to fourth as the big guns get up to pace. Valtteri Bottas leads, Lewis Hamilton is second and Max Verstappen is third.
Luck of the lucha?published at 16:18 British Summer Time 28 October 2017
Image source, Getty ImagesThis guy has popped up in the Red Bull garage this weekend - and he's kind of a big deal in Mexico.
Mistico is one of the most famous professional wrestlers in Mexico and is a massive box office draw in the country.
Lucha libre wrestling is huge in Mexico - it's a style of wrestling with flips and high-flying moves. That's why you'll see so many masks in the crowd.
If you're a WWE fan, you will have seen Mistico during his spell as the character Sin Cara ("without face" in Spanish) between 2011 and 2014.
Can his luchador magic rub off on Max Verstappen and Sebstian Vettel?
Image source, Rex FeaturesPostpublished at 16:17 British Summer Time 28 October 2017
Something for the Mexican fans to cheer as Sergio Perez is fastest so far.
Gasly's poor luck continuespublished at 16:14 British Summer Time 28 October 2017
Pierre Gasly has only managed 10 laps this weekend. Last weekend he travelled all the way to Japan to take part in a Super Formula race. It was cancelled because of bad weather.
Fair to say he's not having too much luck at the moment. Daniil Kvyat, set to be dropped by Toro Rosso, could well be chuckling along from afar.
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End of twitter postThe standingspublished at 16:12 British Summer Time 28 October 2017
And here is a quick reminder of how we stand in the drivers' championship.
Lewis Hamilton only needs to finish fifth tomorrow to celebrate his fourth world title.
Image source, .'No pressure on Lewis'published at 16:11 British Summer Time 28 October 2017
BBC Radio 5 live sports extraThree-time world champion and Mercedes non-executive chairman Niki Lauda has been speaking to BBC Radio 5 live sports extra about Lewis Hamilton's mindset today.
"There's no pressure on him," says Lauda. He's happy. He'll work hard to get pole. It's like a another race.
"I'm confident of pole - the only worry I have is there's only one tenth in it."