Fifth-ranked Argentina against seventh-ranked France
First meeting between sides in knockout stage
The house where the Maradona family lived between 1977 and 1980 has been converted into a museum.
Nothing to do with this game, I just never knew that.
Image source, Getty ImagesDid he have a poster of himself in the fridge when he lived there?
Diego Maradona's 'antics' in the stands were one of the highlights (or lowlights for those who didn't like it) of Argentina's win over Nigeria.
There were big celebrations, sticking his middle fingers up and falling asleep.
Video posted online appeared to show the Napoli legend struggling to get up from his seat at full-time but BBC Sport learned he later boarded a flight back to Moscow.
He had to be seen by a doctor after the game.
Will we see more of the same today?
Image source, Getty ImagesFrance v Argentina (15:00 BST)
France coach Didier Deschamps will be without Manchester City's Benjamin Mendy because of a muscle injury.
Lucas Hernandez should be available and Deschamps is expected to recall the players he rested against Denmark.
Nabil Fekir is pushing for a start after impressive cameos off the bench so far, while right-back Djibril Sidibe may play instead of Benjamin Pavard.
Argentina have no new injury concerns and could stick with the same side that began the 2-1 win against Nigeria.
Midfielder Enzo Perez has a slight thigh problem but should be fit enough to start.
This will be Argentina's 15th game under coach Jorge Sampaoli and it could be the first time he has named an unchanged side.
France v Argentina (15:00 BST)
Patrick Jennings
BBC Sport in Kazan
Argentina's fans are once again out in droves. There are absolutely loads of them around the Kazan Arena soaking up the pre-match atmosphere. For those who fancy it, this includes dancing with a human hiding inside a giant crab costume.
The France supporters I did find were in fine voice though - showing off a lovely little song about N'Golo Kante. Basically the gist of it is that he's short, very nice, and today is going to munch Lionel Messi.
We have written a feature on the major storylines to look out for in the World Cup last 16 - including a picture of this mural of Portugal forward Cristiano Ronaldo by the hotel where Argentina are staying in Kazan.
Image source, Getty ImagesFrance v Argentina (15:00 BST)
BBC One
You can watch today's game on BBC One, via this page or on the TV. Or in virtual reality.
There is also BBC Radio 5 live commentary in case you can't watch it.
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World Cup 2018: France 1-0 Peru highlights
France came through a relatively easy group - beating Australia 2-1 and Peru 1-0 to qualify before the only goalless draw of the World Cup so far against Denmark.
But there is a feeling that their attacking stars haven't really clicked yet.
World Cup 2018: Nigeria 1-2 Argentina highlights
Argentina were almost out after two games, following a 1-1 draw with Iceland and 3-0 humbling by Croatia.
But Ahmed Musa scored twice for Nigeria against Iceland to give them hope.
And then Argentina were set to crash out again, level with Nigeria at 1-1 going into the final five minutes.
But Marcos Rojo's late volley sent them through - the second World Cup in a row where he's scored a winner against Nigeria.
France v Argentina (15:00 BST)
Image source, .The first game of the last 16, and the one this page will be focusing on is France v Argentina - the only game of the round between two genuine heavyweights.
Having said that, France have underwhelmed so far and Argentina have been dreadful at times, with most of their hopes pinned on Lionel Messi.
I'm not sure how Argentina are ranked fifth in the world - they only snuck into the World Cup. France are seventh (between Switzerland and Poland...).
Colombia v England (Tuesday, 19:00 BST)
Image source, .BBC Sport pundit Alan Shearer isn't buying into the idea that England can start thinking about the semi-finals.
"Before the World Cup started, I saw the quarter-finals as a realistic aim, and a decent performance by a young team too, and us being in what some people perceive to be the easier half of the draw does not make a difference to either.
"I also don't think we can start picking and plotting our route to the final and say we only have to beat Sweden or Switzerland in the quarter-finals and we are in the last four.
"With our record at major tournaments, how on earth can we be so arrogant to look ahead like that, or think we will roll anyone over?
"England have won two knockout games at World Cups since 1990 - against Denmark in 2002 and Ecuador in 2006 - so, before we get carried away, let's deal with Colombia first," the ex-England striker said.
Some England fans are already plotting their route to the final after finishing in the 'favourable side of the draw'.
Check out our snazzy groups and schedule page here.
Image source, .Here are the last 16 fixtures...
Saturday
France v Argentina - 15:00
Uruguay v Portugal - 19:00
Sunday
Spain v Russia - 15:00
Croatia v Denmark - 19:00
Monday
Brazil v Mexico - 15:00
Belgium v Japan - 19:00
Tuesday
Sweden v Switzerland - 15:00
Colombia v England - 19:00
All times BST
Image source, Getty ImagesRight, you can put your calculators away.
No more frantically googling what happens if two teams have the same goal difference, no more counting up yellow cards, no more talk of drawing lots.
The group stages are over and we've lost some big names along the way.
It's time for the knockout rounds of the World Cup. There are no draws, no 'that's a decent result'. It's winner takes all, glory or bust.