Michael Carrick's Defensive Dilemma at Manchester United
Michael Carrick begins his first full season at Manchester United with a problem that looks, on paper, like a luxury. Five central defenders. Big reputations. Bigger questions.
Leny Yoro, Ayden Heaven, Harry Maguire, Matthijs de Ligt and Lisandro Martínez form a group that should, in theory, lock down United’s back line. Between them: medals, hype, and the kind of transfer fees that normally buy certainty. Yet Carrick, 44, goes into a four-front campaign knowing there is no plan to strengthen at centre-back unless someone leaves. For a manager still learning on the job, that is a dangerous kind of faith.
Carrick’s step up – and the scale of the test
Carrick steadied the club last season. Handed the reins in January after Ruben Amorim’s sacking, he walked into a dressing room thick with angst and drift. United were out of everything except the league, and the remit was simple: stop the bleeding.
He did. Across 17 Premier League games, United lost only twice – both 2-1 defeats, to Newcastle and Leeds – and conceded 18 goals. They finished seventh on 32 points, nine shy of Aston Villa in third. Respectable, given the mess he inherited. He made United hard to beat, if not yet hard to fear.
Now comes the real job. This season, for the first time, Carrick must guide United through the Premier League, FA Cup, Carabao Cup and the Champions League. No midweek breathing space, no long spells on the training ground to reset. Just a rolling test of his ideas, his squad management and, crucially, the durability of a defence that already looks fragile.
He has only 20 games as United’s manager behind him. The margin for miscalculation is slim.
Youth and promise – but not yet proof
The romantic solution is obvious: lean into youth. In Yoro and Heaven, United own two centre-backs who could anchor the club for a decade. That is the dream. The reality is less settled.
Yoro, 20, arrived from Lille in 2024 for £52m with a reputation as one of Europe’s most elegant young defenders. Sixty-six appearances later, he is the senior figure of the emerging pair, a 6ft 3in athlete with a serious turn of pace and a calm, almost languid style. He looks like a modern centre-back built in a lab.
He also makes mistakes. The hope inside Carrick’s staff is that, after two seasons, the raw edges fall away and the physical gifts finally marry with consistency. This has to be the year Yoro stops being a prospect and starts being a pillar.
Heaven, just 19, is even less tested. Signed from Arsenal for a nominal fee in February 2025, he made 11 league starts last season and caught the eye with his blend of technique, speed and a sturdier frame than his age suggests. He knows where he stands.
“I’m young and I’ve got to be patient, especially in my position. You don’t see a lot of 19-year-olds playing week in, week out. I know it’s nothing personal. I’m waiting for my opportunity,” he says.
Heaven sounds mature. But soundbites don’t win duels in February at Anfield or in a Champions League knockout tie. For all their upside, Yoro and Heaven remain what they were bought as: potential. Carrick needs reliability.
Maguire, Martínez and the weight of time
Reliability, of a sort, is what Maguire once offered. At 33, the former United captain stands at the opposite end of the timeline to Yoro and Heaven. He brings guile, commitment and an old-fashioned sense of duty. He also brings a lack of pace that opponents will target.
Maguire has been around long enough to know how to survive. He was part of the 2024 Carabao Cup triumph and retains a voice in the dressing room. Even after being left out of the World Cup by Thomas Tuchel, he has not shrunk from responsibility. Under Carrick, he would expect to begin the season as first-choice, most likely alongside Martínez.
That plan already looks fragile. Martínez, 28, remains trapped in a cycle of injuries that is turning one of the world’s best defenders into a constant fitness bulletin. He was forced off before half-time in Argentina’s World Cup final defeat by Spain with a muscle problem, and his availability for the season opener at Hull is uncertain.
On his day, Martínez changes games. In United’s 2-1 win over Manchester City in the 2025 FA Cup final, he delivered a performance so complete that Pep Guardiola called him “a top five centre-back in the world”. That is the level. That is the standard Carrick wants as the anchor of his defence.
The problem is obvious: you cannot build a season on a player you cannot trust to stay on the pitch.
De Ligt and another medical file
If Martínez is a concern, de Ligt is a full-blown dilemma. The 26-year-old has not played since United’s 2-1 win at Crystal Palace on 30 November, a back injury eventually requiring surgery in May.
“Since November I have done everything, pushing myself in every session and exploring every option, to get back to doing what I love, playing football,” he said after the operation.
The target is a return early in the season. On paper, de Ligt brings pedigree that should settle any defence: league titles with Ajax, Juventus and Bayern Munich, experience of high-pressure nights and a presence in both boxes.
But backs are unforgiving. Until he strings games together, he sits in the same category as Martínez: vital, decorated, and fundamentally uncertain.
A defence built on ifs
Add it all up and Carrick’s centre-back options read less like a solid unit and more like a list of caveats.
- If Yoro finally cuts out the errors.
- If Heaven adapts quickly enough.
- If Maguire can be protected from the space behind him.
- If Martínez stays fit.
- If de Ligt’s back holds.
That is a lot of ifs for a club returning to the Champions League and trying to close the gap to Manchester City, Arsenal and an increasingly aggressive chasing pack. The full-backs – Noussair Mazraoui, Diogo Dalot and Luke Shaw – can all fill in centrally if required, but that is a contingency plan, not a strategy.
Carrick made United hard to beat last season with a simpler schedule and fewer games. This year, the strain will be relentless. Rotation will not be a choice, it will be a necessity. And every time he turns to his bench, he will be gambling on bodies that have already shown their limits.
Recruitment that doesn’t match the rhetoric
The uncertainty at centre-back is magnified by what United have – and have not – done in the market so far.
Their rivals have moved with intent. Manchester City paid £116m for Eliott Anderson. Chelsea went bigger still, bringing in Morgan Rogers for £117m. Tottenham have thrown serious money at their rebuild, landing Sandro Tonali for £100m and Mateus Fernandes for £85m.
United’s major signing is Youri Tielemans, 29, from Aston Villa, a smart, experienced midfielder but not a defender. Andrey Santos, 22, arrives from Chelsea with just 11 league starts last season. Both may improve the squad. Neither addresses the core anxiety running through Carrick’s back line.
There are still five weeks left of the transfer window. The picture can change quickly. One sale, one opportunity, and United could yet move for another centre-back. For now, though, the club talks up its existing options and leans on the idea that a blend of youth and experience will be enough.
It might be. It might also be the gamble that defines Carrick’s first full season.
Because while the rest of the division spends to remove doubt, United are walking into a brutal, four-front campaign with a defence that looks, at best, unfinished. And if the cracks that already exist widen under the weight of Europe and the domestic grind, the question will not be whether Carrick can coach – he has shown he can – but whether the club gave him a back line worthy of the fight.
