As France have cruised through this World Cup, their stellar attackers so empowered to play with freedom, one concern has been niggling away at Didier Deschamps. It’s why he’s actually asked journalists to point out their few flaws. Now, this week, that concern has finally become an outright problem.

What do France do with their two-man midfield when they face the three of Spain? A team that has swarmed everyone else may suddenly find themselves outnumbered in the key area.

A question that Deschamps’s staff have been asking themselves is whether to fully adapt for that, or continue to entrust the forwards to improve on a record of 16 goals in six games.

Spain, after all, are going to continue to do exactly what they do. They are the team with the most complete tactical idea at this World Cup, by an immense distance. An argument even pervades that this is one reason why Lamine Yamal hasn’t excelled in the manner of other stars, because he is in the one team closest to an elite club side. The deeper tactical integration means he has a more defined role, even if a lot of that ends up utterly exhausting his double markers. Most of them have had to go off early.

Given that, any Spanish adaptation is likely to be to move their possession shape back 20 metres so as not to expose their half to France’s searing pace.

That is the actual way they have accumulated this immense defensive record, of only one goal conceded. It’s of course complemented by the relentlessness of the counter-press. Spain win the ball back 11.57 seconds after losing it, on average, the quickest of all the quarter-finalists. It can be seen in the way they’re immediately snapping at the heels of opposition players, with an energy that roofed stadiums aid. Ultimately, though, Spain do their defending in forward areas. Hence that vast expanse in their own half, that Kylian Mbappe and Ousmane Dembele will be looking at greedily.

So, while this is obviously a match between the tournament’s best defence and best attack, the modern game means it is far from that simple; that it’s obviously not backline against forward line, in the way the description conjures. There’s so much more to it, and numerous tactical layers, illustrated by how Spain will have so more of their possession closer to the opposition goal. Deschamps is meanwhile more willing to release his attackers from much further back.

That is one of many dichotomies at play, that explain why this is best defensive record against best attacking record, without that necessarily being the defining contrast.

Above all, of course, this is a derby between two neighbours with a long actual history and rich recent football history. Look at how Adrien Rabiot’s quotes about Yamal needing to “do more” from before the Euro 2024 semi-final have resurfaced.

That points to how the two have met a lot in the modern era, as both have become pioneers of talent production in very different ways.

In that last big meeting, the roles were almost reversed. Spain were viewed as the more freewheeling and fresh team, spearheaded by young talent. France looked worse than defensive, barely able to score, and it seemed a tournament too far for Deschamps already.

The two years since have shown how much can change between tournaments. Personnel have had a profound effect.

Virtually all of Spain’s most electric attackers have had fitness issues, with Nico Williams only coming back now. They can’t stretch games in the same way, which has required a more compact structure. Many watching on would say it’s far too compact, as the “boring” debate has resurfaced.

France have enjoyed the opposite. They’ve had a flood of young talent come into the side since Euro 2024, to become the great entertainers.

One of those talents has suddenly become one of the best five players in the world, in Michael Olise, while Desire Doue is among the best young stars in the world. Even some of those present in Germany are in completely different form. Bradley Barcola has gone from an impact sub to an effervescent attacker, Dembele is now a Ballon D’Or winner, while Mbappe looks liberated.

And, ever the pragmatist, Deschamps has just played to his strengths. He’s created the most anti-Deschamps team possible, at least going by his coaching history with the French team.

That is what has fostered the real dichotomy of the game, and a genuine philosophical duel.

It is the “positional game” – essentially, the Pep Guardiola game, which has long taken hold in Spain – against the evolving competing idea of “relationism”.

Whereas almost everything Spain do with the ball is dictated by the team structure’s position on the pitch in relation to the ball – outside more licence to Yamal and Dani Olmo – Deschamps has afforded his attackers infinitely more individual interpretation.

The idea of an orchestra coming up against free jazz has rarely been as applicable.

That will naturally provoke a lot of debate about future influence on how the game is played and who should win. That, also, is far from so simple.

A bit like with Guardiola, no one can come close to playing Spain’s positional game like Spain.

France’s approach can’t be anywhere near as devastating, or even that effective, without attackers of this astounding quality.

It is nevertheless natural that it’s the French who are the first to pose this specific ideological challenge in such a high-stakes game. Their model of talent production never adapted that Spanish-Dutch approach in the way that the Germans did, arguably giving them more variety of player – if also missing one archetype: the Rodri.

Deschamps has had to adapt to a more industrious two-man midfield of Rabiot and Aurelien Tchouameni because he does not have that classic number-six. Spain instead have two on the bench.

And that is why the onus is on France to do more, despite doing so much more damage throughout this World Cup in attacking play.

You can already see the way the game will go. Spain are going to take control of possession, gradually moving up the pitch, as France seek to pounce on any break in play.

And, almost reflecting how this defensive record isn’t actually about defence, there is a sense that the Spanish backline hasn’t been properly pressured yet.

Football figures present for the quarter-final in Los Angeles were struck by how Belgium got at them. There’s a vulnerability.

Deschamps just has to figure out how to put more even more stress on it, to get the midfield to funnel more of the play towards the attack despite Spain outnumbering them.

At the same time, Spain didn’t buckle when Charles De Ketelaere finally ended Unai Simon’s clean-sheet record. That can happen when a long record is finally broken, and there’s suddenly doubt again.

They instead kept playing.

They’re going to have to do even more of it against France, if only to limit how much those attacking stars have the ball.

For all the billing, this is much more than attack against defence.

And, in a purely tactical sense, it may end up meaning more than any modern World Cup game.

There is so much to consider.