A reminder as the Peru anthem plays that France have already won in this group. Some of these Peru players are belting this out. My word...

Rio Ferdinand
Former England defender on BBC One

I think stars and top players are used to pressure and that reliance. Christian Eriksen has it at club level for Spurs too and he could get into any team in Europe at the minute with the way he is playing.

We have players in the tunnel. Players wearing very focused faces by the way.

Here they come...

Image source, Johan Renhard

Back in 1999, on the mountainous border between Chile and Argentina, the frozen bodies of three Inca children were discovered on top of a volcano.

Perfectly preserved amid freezing conditions 6,000 metres in the sky, they had lain undisturbed since they were sacrificed around five centuries earlier.

Nearly two decades have passed, but the discovery is still teaching us about the world they left behind.

And over the past year, these three mummies played an unlikely role in getting Peru's record goalscorer and captain to the World Cup in Russia despite his doping ban.

This is the story of how that came to be.

Click here to read the rest of Patrick Jennings' feature on Paolo Guerrero's fight to be eligible for the World Cup.

Cesc Fabregas
Chelsea and Spain midfielder on BBC One

I think Denmark will win but it will be tough. Peru could surpsise tehm early on if they are focused. They are technically good and have quick feet. So it will be tough for Denmark.

Image source, .

Paolo Guerrero is a two-time Bundesliga winner with Bayern Munich. With clubs like Hamburg and Corinthians also on his CV, he's understandably a go-to man for his country.

He's something of a national hero. In 2016, a biopic about his life had the best-selling opening of any film in the country.

If that's not cool enough, his surname translates to 'warrior' too.

Come on, let me see your pictures of doublers and completed pages.

Show off your work with pride. I'm on #bbcfootball.

Jermaine Jenas
Former England midfielder on BBC One

Peru have been starved of World Cup action after 36 years away from the competition, and to get out of their qualifying group was brilliant.

Image source, Getty Images

One of the key talking points around this fixture is the fact Paolo Guerrero is playing.

My word has he had a journey to get here.

A positive drug test flagged cocaine in his system in October. He put this test down to herbal tea but was banned for 12 months. That prompted an appeal, the ban was reduced and then the World Anti-Doping Agency called on the ban to be increased again.

That was the cue for three World Cup captains - Hugo Lloris of France, Australia's Mile Jedinak and Denmark's Simon Kjaer - to write an open letter calling on Fifa to temporarily lift the suspension and allow the Flamengo forward to play in Russia.

His ban has now been lifted until after the tournament when the necessary evidence will be considered again.

For more on this bizarre saga, click here and read a feature by Patrick Jennings.

The last time Peru were in a World Cup, the Commodore 64 had just been launched.

1982, you were a gift to humanity.

Image source, Getty Images

Rio Ferdinand
Former England defender on BBC One

I got on a flight to Russia thinking I was going to Peru, there are so many Peruvians out here. They are all happy and jovial, waving their flags, it just adds to the atmosphere. It is fantastic.

Image source, Getty Images

When your country reach the World Cup for the first time in nearly four decades, strange things can happen. In Peru for example, people went so mad for official World Cup stickers that fights broke out in shops.

Demand was so high that one mayoral candidate offered free stickers in exchange for votes. And police (pictured) have seized thousands of counterfeit albums.

How seriously are you taking your sticker efforts? Let me know on #bbcfootball.

Go on my son, sing it loud...

Image source, Getty Images

And you sir, no holding back...

Image source, Getty Images

Image source, Getty Images

Peru's fans are having a great time around the Mordovia Arena in Saransk. There are reports of 50,000 of them visiting Russia for this historic World Cup outing.

They'll know all about their sides' strengths, including a rapid counter attack. Nearly half (46%) of Peru's goals in qualifying came on the break. The most passes they made in a build-up to a goal was six.

Some pundits have said they may well struggle physically. Their average height in qualifying was 5ft 10in. That's the third smallest of any side in Russia.

Image source, Getty Images

Just having a flick through the Denmark results of late and their last four friendly matches have seen them concede no goals.

A platform from which to build...

Our very own Simon Brotherton has top stat...

Brian: I have the Danes in the work's sweepstakes, so... sorry, Peru!

Peru captain Paolo Guerrero, who was cleared to play last month after a Swiss tribunal ruled on a drugs ban, starts on the bench. Andre Carrillo, who spent the 2017-18 season on loan at Watford, starts in an attacking midfield role.

Image source, .

Up front for Denmark is Feyenoord's Nicolai Jorgensen, who has been selected over Ajax's Kasper Dolberg.

Right-back Henrik Dalsgaard will become the first player under contract at Brentford , externalto feature at a World Cup.

There are also plenty of other English-based players out there with Kasper Schmeichel (Leicester), Andreas Christensen (Chelsea) and Christian Eriksen (Tottenham) also starting, while Ipswich's Jonas Knudsen is on the bench, as are Huddersfield duo Matthias Jorgensen and Jonas Lossl.

Image source, .

Christian Eriksen starts for Denmark and has averaged just under a goal a game for his country over the last two years.

Image source, .

Live coverage of this match starts at 16:30 BST on BBC One.

Gary Lineker is joined in the studio by Rio Ferdinand, Jermaine Jenas and Cesc Fabregas.