How do you break a two-bank block that has decided, before kick-off, to concede the ball and defend its own penalty area? You do not break it with speed. You break it with geometry. On Sunday, Spain beat Saudi Arabia 4-0,T2 - MercatoWire fixtures feed and the scoreline is the least interesting thing about the match. The interesting thing is the method. Saudi Arabia arrived with a 4-4-2 that became a 4-4-1-1 without the ball, two flat lines of four sitting deep, the gaps between players compressed to the width of a corridor. Spain’s task was not to run through that corridor. It was to make the corridor move.

A deep block is a problem of fixed reference points. Each Saudi defender is told to hold a zone, to watch the man nearest him, to step only when the ball demands it. The whole structure depends on those reference points staying where they are put. Spain’s positional game, under the principles Luis de la Fuente has carried from the previous cycle, is built to do one thing to a fixed reference point: ask it a question it cannot answer without moving. Every rotation, every man dropping into a half-space, every full-back inverting, is a question. Move, and you open the zone you were told to hold. Stay, and you concede the pass.

Start with the base shape in possession. Spain built in what was effectively a 3-2-5, the familiar continental construction. One pivot dropped between or alongside the centre-backs to make a back three in the first phase; the second pivot held just ahead. That gave Spain a clean two-versus-one or three-versus-two in the build, which against a front pairing that pressed only in flickers meant the ball could be walked forward without risk. The point of the back three was never the build itself. It was the five ahead of it. Spain committed five players to the last line, and against a back four that is the entire argument. Five attackers, four defenders, and the maths of the block is already broken before a pass is threaded.

Now the width. This is where Lamine Yamal turns a structural advantage into a spatial crisis for the opposition. Yamal does not hug the touchline because he likes the touchline. He holds maximum width on the right because every metre he stretches the Saudi left-back away from his centre-back is a metre of grass that opens in the half-space behind. When a winger pins a full-back to the chalk, the distance between that full-back and the nearest centre-back becomes the most valuable real estate on the pitch. Spain populated that real estate. The right-sided eight, the inside-forward, the inverting full-back: somebody was always arriving into the channel Yamal had pried open. The Saudi left-back faced the oldest unsolvable question in defending. Follow Yamal to the line and the channel is undefended. Tuck inside to cover the channel and Yamal receives in space to cross or cut. There is no correct answer. There is only the least bad one, and Spain scored from the gap between the two.

The mirror of that width is the central overload, and this is the part of the geometry that a deep block is least equipped to survive. Saudi Arabia’s two banks of four gave them eight men behind the ball, which sounds like enough until you count Spain’s occupation of the centre. When the full-backs invert and the eights step high, Spain can flood the central zone between the lines with three, sometimes four bodies, all positioned in the seams where a defender from the back line and a midfielder from the line ahead both think the other man has responsibility. That is the killing space in a two-bank system. The defensive line will not step up to follow a runner there, because stepping up breaks the offside trap and exposes the space behind. The midfield line will not drop to track him, because dropping pulls the whole bank deeper and surrenders the territory it was built to protect. So the receiver in that seam gets the half-second that a positional side is designed to manufacture. Mikel Oyarzabal, who scored twice,T2 - MercatoWire fixtures feed lives in exactly that seam. He is not a runner in behind first; he is a finder of the space where two defensive responsibilities cancel each other out.

Walk through the pattern, because it repeated all afternoon and the repetition is the proof it was designed, not stumbled upon. The ball starts with the dropping pivot in the first line. Yamal is wide right, pinning the Saudi left-back. The right-sided eight steps into the half-space, which forces a decision on the Saudi right-central-midfielder: does he slide across to cover, or hold his zone? If he slides, the centre of the pitch thins, and Spain’s central trio now has the numerical edge through the middle. If he holds, the eight receives between the lines and turns. Either way the ball travels to the side where the question was hardest, and the moment a Saudi defender finally commits to answering it, the structure has a hole, and Spain’s fifth attacker is already running into it. This is not improvisation. It is a machine for generating the same overload from different starting points until the block makes one mistake. A deep block can survive ten of these. It cannot survive forty.

The thing a two-bank defence fears most is the switch, and Spain used the threat of it as much as the act. With Yamal isolating one flank, the simple diagonal to the opposite side arrives against a block that has shuffled across to compress the ball-side. The far full-back, having narrowed in to keep the lines connected, is now the wrong distance from his touchline. Spain did not need to complete every switch. They needed Saudi Arabia to fear it, because the fear is what kept the block sliding laterally, and a block that is sliding laterally is a block whose reference points are in motion. Once the points move, the seams open, and the seams are where La Roja’s whole game is aimed.

A word on what the block did right, because Saudi Arabia were not passive victims of physics. For long stretches the two banks held their shape with real discipline, and the compactness between the lines denied Spain the easy vertical pass into feet. The problem is that defending a positional side well is not a stable equilibrium. It is a holding action. The block can hold for a phase, for several phases, but every Spanish rotation is a small withdrawal from the defenders’ bank of concentration, and concentration is finite. The fourth goal, unattributed in our feed,T2 - MercatoWire fixtures feed is the tax on ninety minutes of being asked the same unanswerable question. Eventually a reference point moves a half-second early, and a positional side is built to punish exactly that.

The result leaves Spain top of Group H on four points after two matches.T2 - MercatoWire fixtures feed The tactical reading offers a caution alongside the dominance, and it is the caution that will matter at the business end of this tournament. Breaking a deep block is the easiest hard problem in modern football, because the block, by sitting deep, hands you the ball and the time. The harder problem comes against an opponent who refuses to sit, who presses Spain’s back three and contests the build, who turns the first phase into a duel rather than a stroll. Saudi Arabia gave Spain the canvas. A side that pushes its line up and hunts the dropping pivot will not. That is the question de la Fuente has to keep answering, not the one Sunday posed. The geometry that unpicked a two-bank lock is not the same geometry that beats a high press, and the knockout rounds will ask the second question long before they ask the first.