Kimi Antonelli is on track to become F1's youngest world champion, as the F1 Mexico City Grand Prix is stopped following a scary crash.
Follow all the action of the Formula 1 Mexico City Grand Prix on the live blog below.
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Live: F1 Mexico City Grand Prix
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Valtteri Bottas walks away from the crash
Race will resume at 8:45am AEDT
Race control reverts to grid order one lap before red flag
There is some reprieve for Lewis Hamilton and Oscar Piastri.
They pitted under the safety car, just before the red flag halted the race.
Both drivers lost a position because of it.
But race control has decided the grid order should be as it was when the safety car came out.
When we restart, this will be the order:
Lewis Hamilton is very, very angry
It has not gone well for Lewis Hamilton today.
He was furious that Charles Leclerc went off track and took the lead from him.
He was furious that the penalty to Leclerc was only five seconds.
And now, he is furious he pitted and his teammate didn't, losing a position and then the race was stopped.
"We've got big problems. Big, big problems."
2016 world champion Nico Rosberg, calling for Sky Sports, has kindly translated that message.
"The translation is: 'I am very, very angry, and this is, maybe, the last chance. After that I am going to take it in my own hands.'
"And that's when things are going to go really bad."
WATCH: Wheel rips off Valtteri Bottas's Cadillac
Valtteri Bottas has wheel rip off before crash
Valtteri Bottas was a passenger in that crash.
The wheel of his car just snapped off as he braked at the end of the straight.
That resulted in the Finn flying into the barrier.
(Kayo/Fox Sports)
Hamilton loses out with red flag
Lewis Hamilton dived into the pits for new tyres, but lost a position to Kimi Antonelli.
Then the red flag came out, and the race was stopped.
Now all cars must come into the pits, and all drivers can change tyres.
Hamilton has, unfortunately, given up a place for free.
"We've got big problems. Big, big problems."
RED FLAG: The Mexico City Grand Prix has been stopped
Valtteri Bottas had a massive shunt, but he has given a thumbs-up.
Lewis Hamilton and George Russell pit
Max Verstappen and Charles Leclerc drive on, but Lewis Hamilton and George Russell dive into the pits.
Antonelli pitted a lap before. Had he and Mercedes pitted one lap later, he may have been close to the lead.
44/71: SAFETY CAR: Valtteri Bottas crashes
43/71: Kimi Antonelli pits
Kimi Antonelli was the last driver to come into the pits.
The champion-elect pits from the lead, and it is a slightly slow stop.
I reckon the Mercedes pit crew were feeling the pressure.
But Antonelli comes back out on track in fourth place, and he just needs to bring his car home and become world champion.
38/71: Antonelli continues to lead as Norris pits
Kimi Antonelli has stayed out and kept driving.
Clearly, the Mercedes team are happy with their champion-elect just keeping out of trouble.
Lando Norris comes in for his pit stop, but it is a horror stop. He is stationary for 6 seconds.
37/71: Oscar Piastri struggling with turn 12
Oscar Piastri has twice gone wide at turn 12, a corner at the end of a smaller straight.
33/71: George Russell pits and serves 10-second penalty
30/71: Antonelli leads from Russell and Norris, yet to pit
Kimi Antonelli leads the grand prix, ahead of George Russell and Lando Norris.
The net leader of the race is Max Verstappen on soft tyres, ahead of Ferrari duo Charles Leclerc and Lewis Hamilton on medium tyres.
28/71: Lewis Hamilton pits
Lewis Hamilton has one lap in the lead with clean air, then Ferrari pulls him into the pits.
He comes out behind Verstappen and Leclerc.
27/71: Leclerc and Verstappen pit
Charles Leclerc and Max Verstappen come into the pits.
Leclerc serves his five-second penalty, and Verstappen overtakes him in the pit lane.
Verstappen has the net-lead of this grand prix.
26/71: Oscar Piastri pits for medium tyres
Hamilton says stewards 'handing' Leclerc the victory
He and teammate Charles Leclerc went off track when battling for the lead.
While Hamilton tried to get back on track as soon as possible, and fell behind Max Verstappen, Leclerc cut the corner and kept the lead.
Leclerc was handed a 5-second penalty, which Hamilton did not think was harsh enough.
The five-second penalty for Leclerc does not seem like a tough penalty, when he has a bigger lead over Hamilton and he is driving in clean air.
At least, that is what Hamilton feels, and he is making his thoughts known.
The stewards are basically handing Charles this win.
20/71: Leclerc leads with penalty hanging over his head
Charles Leclerc continues to lead the Mexico City Grand Prix, but will serve a five-second penalty during his pit stop.
Max Verstappen is second, after getting a great start from fifth. Verstappen us 4.7 seconds behind.
Pole sitter Lewis Hamilton is third, while Mercedes driver Kimi Antonelli is fourth.
Antonelli appears to be taking things nice and easy, knowing he just needs to finish ninth to become world champion.
15/71: Hamilton and Verstappen unimpressed with Leclerc's punishment
Charles Leclerc has a five-second penalty for gaining an advantage when he went off track and took the lead from Lewis Hamilton.
Hamilton was unimpressed, as he was already more than five seconds behind. The Briton says it is a useless punishment because Leclerc is driving in clean air while everyone else must manage tyres.
Max Verstappen, who is second, also said over the radio that he believed the regualtions say Leclerc should cop a 10-second penalty.
PENALTY: George Russell — 10 seconds (causing collision with Isack Hadjar)
George Russell has been handed a 10-second penalty for spinning Isack Hadjar.
PENALTY: Charles Leclerc — 5 seconds (leaving track and gaining advantage)
Charles Leclerc has been handed a five-second penalty for leaving the track and gaining an advantage.
This was the moment on lap one when he took the lead from Lewis Hamilton.
12/71: Oscar Piastri up to seventh
Great start from Oscar. ! Will he finally get some luck today ?
It has been a lovely start from Oscar Piastri.
He is up to seventh after starting this grand prix from 12th on the grid.
The Australian is six seconds behind teammate Lando Norris, who is sixth.
George Russell under investigation for lap one incident
Red Bull's Isack Hadjar went spinning on the opening lap after being clipped by Mercedes driver George Russell.
Russell is under investigation for that moment.
10/71: Leclerc leads as Antonelli catches the top three
Charles Leclerc leads, with the stewards still investigating his move on teammate Lewis Hamilton from the first lap.
Leclerc's lead over Max Verstappen is three seconds, with Hamilton a further 1.7 seconds behind.
Mercedes champion-in-waiting Kimi Antonelli is fourth and catching Hamilton.
8/71: VSC ends and green flag racing continues
Red Bull's Isack Hadjar came into the pits during the VSC and changed from softs to mediums.
7/71: Virtual Safety Car: Aston Martin's Lance Stroll stops
Fernando Alonso just boxed the car to retire.
Now, Lance Stroll was told to stop the car, and the Canadian has tried to get the car into an escape road.
5/71: Aston Martin's Fernando Alonso told to retire his car
WATCH: Mexico City Grand Prix race start
3/71: Leclerc-Hamilton incident under investigation
Leclerc went for a move around the outside of Ferrari teammate Hamilton at turn four.
Both drivers went off track, with Leclerc cutting the corner and holding the lead.
2/71: Leclerc leads Verstappen by one second
Leclerc leads, but we wait to see if there is an issue with the stewards over his lap one moment with Lewis Hamilton.
1/71: Chaos on the opening lap
Lewis Hamilton gets a terrific start from pole, and he leads into the first corner.
Ferrari's Charles Leclerc is up to second, and Leclerc makes the move on Hamilton.
Both go off track, the Leclerc cuts the corner.
Leclerc is first, but will need to give that place back, and Lewis Hamilton is third.
"Got pushed out by my teammate," says Hamilton.
Kimi Antonelli remains fourth, Isack Hadjar has spun, and Oscar Piastri is up to ninth.
RACE START: Mexico City Grand Prix begins
Lewis Hamilton locks his tyres on the formation lap
Pole sitter Lewis Hamilton has locked his tyres heading into the first corner on the formation lap.
He is on used softs, so that won't be good for their longevity.
FORMATION LAP: Mix of soft and medium tyres
Lewis Hamilton leads off the field for the formation lap.
Let's see which tyre compounds the teams have chosen.
The top three — Hamilton, Russell, Leclerc — are all on softs
The next three — Antonelli, Verstappen, Norris — are on mediums.
Oscar Piastri is starting on softs from 12th.
What to know about the track in Mexico City
Firstly, Autódromo Hermanos Rodriguez sits high in the skies, more than 2km above sea level.
With less air, it means less drag and less downforce.
The first sector is relatively straightforward, with the best overtaking spot on the track coming at the first turn, at the end of a very, very long straight.
(F1)
The Autodromo Hermanos Rodriguez has plenty of medium- to high-speed corners in the second sector which punish the tyres.
With hot and struggling tyres, drivers must slow down and be precise through the stadium section, or risk being vulnerable down the main straight to start the next lap.
Straight Mode can be used down the main straight, and the straight from turns three to four, which is another potential overtaking zone.
What are the strategy options in Mexico City
The simulation from tyre manufacturer Pirelli suggests a one -stop is best, but a two-stop could work as well.
The soft and medium compounds seem to be the go-to tyres, with Pirelli chief engineer Simone Berra quoted as saying: "Everything is open, but we strongly think using the softer compounds will be the best option in a race of either one or two stops."
(F1)
If a driver starts on the mediums and switches to softs, the pit window is between laps 35 and 41. If they do it the other way, the window is laps 30-36.
Should a driver go for a two-stop, they are expected to pit around laps 19-25.
There are only three drivers who do not have a new set of soft tyres: Lewis Hamilton (Ferrari), George Russell (Mercedes), and Isack Hadjar (Red Bull).
How can Mercedes win the F1 constructors' championship today?
It may be double delight for Mercedes today.
While Kimi Antonelli is on track to seal the drivers' championship, his Mercedes team can claim the team' title this morning as well.
Constructors' championship standings
Mercedes need to outscore Ferrari today by 39 points or more to seal the title.
Here is how Mercedes can win the constructors today:
Why is Oscar Piastri starting 12th when he qualified 13th?
Morning Michael. You’re a busy man. I’ve missed something. Why has Oscar moved from 13th to 12th?
Great question, and thanks for reminding me.
Racing Bulls driver Liam Lawson was disqualified from qualifying after being the eighth-fastest.
The Kiwi was disqualified for a technical breach of his car, relating to electrical power output after a flying lap.
Evidence submitted, which was accepted by all parties present, showed that after the control line at the end of his fastest lap in Q2, the driver did not lift off the power immediately. This resulted in the rate of reduction of MGU-K deployment required to achieve the regulated 'step down', not being achieved.
The team argued that this did not provide any performance advantage however it is clear that non-compliance with the Technical Regulations is not excused if no performance advantage is gained. Further, these regulations require that a car must comply with them at all times during an event.
The stewards note in particular that the team self-disclosed the breach however there are a multitude of precedents that require us, despite all mitigating circumstances, to impose a penalty of disqualfication where a car does not comply with the Technical Regulations.