This is a data-led Manchester United tactical analysis of Michael Carrick’s 4-2-3-1, published inside my Scouting Reports hub.
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Five games. Four wins. And one structural question mark.
Michael Carrick has achieved what Ruben Amorim couldn't in months: he has made Manchester United look defensively organized.
But let's be careful with the "tactical genius" label. Five games is a statistical coin toss, not a season-defining sample. While the 13 points from 15 are phenomenal, they have come with significant caveats, games that suited us, Spurs' red card, and a West Ham draw that exposed the limitations of this new system.
Below we have a deep dive into Michael Carrick’s system so far at Manchester United.
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Can Carrick's system succeed long-term at Manchester United?
Table of Contents
How Carrick's System Works
Understanding Carrick's approach requires looking at both phases of play, what United do with the ball, and what they do without it.
Out of Possession: The Mid-Block and Pressing Traps
The Base Shape: Without the ball, United drop into a compact 4-4-2 or 4-4-1-1 mid-block. Bruno Fernandes pushes up alongside the striker (Mbeumo or Sesko) to screen the pivot, while the wingers (Cunha and Amad) track back to form a midfield line of four.
Against superior opposition or when protecting a lead, Carrick has also deployed a 5-3-2. This defensive flexibility is a departure from Amorim's more rigid back-three system.

United sit in a compact 5-3-2, with the front two screening central passes and pushing play wide.
The Pressing Strategy: Carrick's United are not constant high-pressers, but they're not passive either. The key principle: Force opponents wide, then spring the trap.
When the opportunity presents itself, usually a heavy touch or a back pass to the goalkeeper, United will press aggressively. Bruno and the striker jump to force play to one side of the pitch. Once the ball is shuffled to a flank, the trap is set: the winger presses outward, the full-back (Dalot or Shaw) jumps higher, and the double pivot slides across to cut off the inside pass.
You can see the sequence clearly vs Arsenal.

United spring the press on Arsenal’s goalkeeper, forcing play to the right side and cutting off the central outlet
If the opponent tries to reverse the ball back inside, they're met by a wall of United players, Bruno, the striker, both pivots, and the far-side winger squeezing across. If the opponent tries to play long they encounter the center-backs stepping up or if they play in the air Maguire often wins first contact then Casemiro is there to win the second-ball.
It's pragmatic, disciplined, and crucially it doesn't leave the team exposed in transition.
In Possession: The 3-2-5 Shape and Short-Passing Build-Up
While United defend in a back four, in possession they morph into a 3-2-5 structure. One full-back (typically Dalot or Shaw) tucks inside or holds deep, creating a back-three base. This allows the wingers to stay high and wide pinning opposition full-backs back.

United build in a 3–2 shape: one full-back tucks in, creating a back three and two midfield options to play through the first press.
The Double Pivot Engine: The heart of Carrick's system is the double pivot (Casemiro and Mainoo), positioned just ahead of the center-backs. They constantly exchange short passes with Martinez and Maguire, manipulating the opposition press to create gaps for forward passes. These aren't aimless sideways passes they're designed to draw opponents out of position.
The Central Overload: Cunha tucks inside from the left to create a fourth central body between the lines while Amad provides width on the right. This central overload allows for quick bounce passes and through balls.
The philosophy is simple: dominate central spaces, progress through short connections, and go wide when the middle is blocked.
Positives: This approach is devastating against teams that push up (City, Arsenal). The patient build-up draws opponents forward, creating space in behind for Cunha or Amad to exploit on the break, with Bruno threading passes through the lines.
Negatives: Against teams that sit deep (West Ham), the system stalls. Without space to transition into, United lack the rehearsed patterns to unlock compact defenses. The wingers stay too wide, the double pivot sits too deep, and Bruno becomes isolated as the only creative force.
Why United Can't Break Down Low Blocks
The West Ham draw wasn't bad luck it was a tactical problem that Carrick hasn't solved yet.
When a team defends deep and compact, they create a simple but brutally effective challenge for attackers:
Central areas are closed off. With the defensive line positioned close to the penalty area and midfielders dropping to cover gaps, there's minimal space between the lines for passes or runs.

United have numbers between the lines, but West Ham’s compact shape shuts the middle
As United pass the ball from side to side, West Ham could remain organized without needing to press. Patience and discipline mean the defending team can avoid creating gaps through unnecessary movements.
Then when United are forced wide, they're crossing into a penalty area packed with defenders who outnumber attackers. Even quality deliveries struggle when there are 7-8 opposition bodies in the box.

West Ham drop into a deep low block with 8–9 bodies around the box, forcing United wide.
This is exactly what happened against West Ham. United had 55% possession but created almost nothing. The U-shape of their possession showed a team going nowhere, recycling the ball in harmless areas while the opposition sat comfortably in their defensive third.
How Carrick Could Solve It
Start Sesko against low blocks
If United are going to be forced into crossing situations against deep defenses, they need aerial presence in the box. Benjamin Sesko's 6'4" frame makes him a natural target for crosses from Shaw and Dalot. Mbeumo works brilliantly as a false-nine against high lines, but against packed penalty areas, Sesko's physicality becomes essential. His ability to win first balls and flick-ons also creates second-ball opportunities that the current setup lacks.
Push Mainoo higher
Against deep blocks, Mainoo (the more technical of the two pivots) needs to push into the #10 space alongside Bruno, creating a 4-1-4-1 shape. This overloads the area just outside the box where low blocks are most vulnerable. Casemiro can anchor alone when the opposition isn't counter-attacking.
Quick switches of play
Slow side-to-side passing allows defenses to shift comfortably. Rapid switches, skipping the congested near side to hit the far side before the defense adjusts can create momentary overloads.
The Upcoming Tests
The next month will tell us everything. Everton and Crystal Palace will sit deep and dare United to break them down. If Carrick can implement even two of these adjustments, particularly starting Sesko and pushing Mainoo higher, United could grind out wins. If he sticks to the current formula, expect more West Ham-style frustration.
Frequently Asked Questions
Q: Will Carrick get the permanent job?
A: That depends entirely on solving the low-block problem. Beating City and Arsenal was impressive, but every United manager since Solskjaer has been able to play counter-attacking football. The "permanent" quality Carrick needs to show is the ability to dominate and dismantle smaller teams, something he failed to do against West Ham.
Q: Is Carrick playing "defensive" football?
A: It's pragmatic, not negative. Against top teams (City/Arsenal), he plays a counter-attacking low block. Against mid-table teams, he tries to control possession, though the West Ham game showed this is still a work in progress.
Q: Why does the 4-2-3-1 work better than the back three?
A: It suits the squad. United have excellent wingers (Amad, Cunha) who were wasted as wing-backs under Amorim. The 4-2-3-1 allows them to play in their natural advanced positions while keeping four defenders back to cover.
Q: Who is the biggest winner under Carrick?
A: Casemiro. Under Amorim, Casemiro was often exposed in vast midfield spaces. Carrick's compact block means Casemiro has to cover less ground, allowing him to focus on reading the game rather than chasing runners, with Mainoo providing the technical quality alongside him. Related: Our deep dive on Casemiro
Q: What happens if this system fails?
A: If the low-block struggles continue, United face a difficult choice: trust Carrick to evolve his possession game (which takes months), or admit this was a short-term defensive fix and restart the manager search in the summer.

