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Saudi Arabia would progress to the last 16 with a win
A Mexico win would see them through if Poland beat Argentina
If that games finishes in a draw or Argentina win, Mexico would need to win by at least four goals
That is all from us for tonight.
Argentina top Group C and Poland join them in the last 16, ahead of Mexico by the thinnest of margins!
I'll leave you with the tale of an extraordinary night in clips...
Alvarez doubles Argentina's lead with 'brilliant' goal
Image source, BBC SportThere's life in the old dogs yet!
Robert Lewandowski and Lionel Messi are heading for the last 16.
Gary Lineker
Ex-England striker on BBC One
It's been a crazy day of football with the twists and turns you get at this stage of the competition.
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Peter: Mexico's group stage started with goalkeeping heroics saving them from the spot. They end their group stage with goalkeeping heroics (in the other game) condemning them from the spot. Cruel symmetry
FT: Poland 0-2 Argentina
Alexis Mac Allister and Julian Alvarez both scored their first goals at the World Cup, with only Brazil (83) and Germany (77) now having more different scorers in the competition than Argentina (62, excluding own goals).
FT: Poland 0-2 Argentina
BBC Red Button
Alexis Mac Allister speaking to BBC Red Button: "Very happy to score my first goal for Argentina. today was an amazing moment for me and for my family. It's a big moment for me and I will always remember it.
On next opponents Australia: "We think they are a good team. I played against them in the Olympic Games, we lost. So we know how difficult they are, of course, not the same team and we are not the same team but they are a very good team and it will be a tough side."
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Stephen: A very poor and lucky Polish team. To think, before that late Saudi Arabia goal they were still advancing - but on fewer yellow cards received. Chaos indeed!
FT: Poland 0-2 Argentina
Argentina completed 800 passes and had a pass completion rate of 92% in this match – both of which were their highest in a World Cup game on record (since 1966).
Image source, BBC SportFT: Poland 0-2 Argentina
Despite their defeat in this game, Poland qualified from the group stage of a World Cup tournament for the first time since 1986.
They had failed to do so in each of their previous three appearances at the tournament prior to this year (2002, 2006 and 2018).
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Steve: Two cracking goals from Mexico and very unlucky. Great game.
FT: Poland 0-2 Argentina
Andy Cryer
BBC Sport in Qatar
This is incredible.
The Argentina fans are not going anywhere. The noise coming from both ends of the ground as the blue and white shirts jump up and down to some catchy tune.
It feels like they believe this could be their year!
FT: Poland 0-2 Argentina
Rio Ferdinand
Former England defender on BBC One
The end was crazy, we didn't know whether we were coming or going. Poland were poor today, I don't see them going past this stage. They did well to get where they are but Lewandowski was starved of any good service.
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Sho: Too little too late from Mexico. Where was this in the first two games?
FT: Saudi Arabia 1-2 Mexico
Matt Upson
Former England defender on BBC Two
Chance after chance, we were off our seat thinking Mexico were going to do it.
FT: Poland 0-2 Argentina
Pablo Zabaleta
Ex- Man City and Argentina defender on BBC One
That was Argentina's best performance so far in the tournament. This is more what we expected from Argentina before the World Cup. Enzo Fernandez, Julian Alvarez have been involved in goals. It seems that Scaloni has found the best starting eleven so hopefully we can see that again. We've got a good draw against Australia which is good.
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Alex: Poland are like that student who didn’t contribute in the group project but still gets a top grade.
FT: Poland 0-2 Argentina
Andy Cryer
BBC Sport in Qatar
There are tears of happiness from the Poland fans.
Or they might just be emotionally drained after that.
They were never at a point of exiting the competition at any stage - but it really felt they were.
BBC Red Button
Don't go anywhere just yet.
The coverage may have finished on BBC One, but there is more. If you go to the red button or use the play button at the top of this page you can follow our World Cup Extra show.
Tonight, Gary, Alan, Rio and Pablo Zabaleta will be discussing Argentina. After that you'll be able to watch the recent BBC documentary 'Messi'.
We have two more last-16 ties confirmed...
Sat 3 December: Argentina v Australia (19:00 GMT)
Sun 4 Dec: France v Poland (15:00)