Michael Carrick's Defensive Challenge at Manchester United
Michael Carrick begins his first full season as Manchester United manager with a smile in public and a knot in his stomach in private. On paper, he has five central defenders of serious pedigree: Leny Yoro, Ayden Heaven, Harry Maguire, Matthijs de Ligt and Lisandro Martínez. In reality, he has a puzzle that could define his year.
United will attack four competitions – Premier League, FA Cup, Carabao Cup and, for the first time in two seasons, the Champions League – with a backline that feels more like a calculated gamble than a finished product.
A manager stepping into the real thing
Carrick’s audition went well. Thrown in last January after Ruben Amorim’s sacking, he had 17 league games, no distractions from cups, and a dressing room still shaking off the chaos of the Portuguese’s exit. He steadied the ship. United lost only twice – 2-1 to Newcastle and 2-1 to Leeds – and conceded 18 goals. Seventh place, 32 points, nine behind third-placed Aston Villa, looked respectable from where they had been.
He made United hard to beat. Now he has to make them good enough to compete.
This is the acid test. Twenty games into his reign, Carrick goes from caretaker clarity to full-season scrutiny. Every flaw in his squad, every risk the club has taken, will be dragged into the light. Nowhere is that more obvious than at centre-back.
Youth, promise – and a steep learning curve
Yoro and Heaven are the future. Carrick needs them to be the present.
At 20, Yoro is already the senior partner of the two, with 66 appearances since his £52m move from Lille in 2024. Tall at 6ft 3in, quick across the ground, unflustered on the ball – the raw materials are all there. So are the occasional lapses. After two seasons, this has to be the year he turns potential into authority, not just a highlight reel of recovery tackles and neat passes.
Heaven, 19, is even earlier in his journey. Signed from Arsenal in February 2025 for a nominal fee, he made 11 league starts last season and showed why United moved for him: 6ft 2in, technically sound, quick, physically strong. He knows his place in the hierarchy for now. “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 said.
The opportunity will come. The question is whether it comes on Carrick’s terms or is forced on him by the fragility of those ahead of Heaven in the pecking order.
Maguire, Martínez and the weight of experience
At the other end of the age scale stands Maguire, 33, battle-hardened and still divisive. The former England defender brings nous, bravery and leadership. He also brings one pace. In a league that punishes slow feet and slow turns, that matters.
Left out by Thomas Tuchel for the World Cup, Maguire’s international stock has dipped, but inside United he remains a figure of influence. He captained the club, helped deliver the 2024 Carabao Cup, and under Carrick he would expect to start the season as first-choice, likely next to Martínez.
If Martínez is fit. That “if” hangs over everything.
The 28-year-old Argentinian, The Butcher, is a defender Guardiola once rated “a top five centre-back in the world” after United’s 2-1 win over Manchester City in the 2025 FA Cup final. He gives United edge, aggression, and clarity in possession. He also gives Carrick sleepless nights.
Martínez was forced off before half-time in Argentina’s World Cup final defeat by Spain with a muscle problem. His availability for the opener at Hull is already in doubt. His quality is not the issue. His reliability is.
Carrick cannot build a season on a centre-back who might not be there when the games pile up and the stakes rise.
De Ligt and another fitness roll of the dice
If Martínez is a concern, De Ligt is a full-blown uncertainty.
The 26-year-old has not played since United’s 2-1 win at Crystal Palace on 30 November because of a back injury that eventually required surgery in May. After the operation he spoke of pushing himself in every session, trying everything to get back to “doing what I love, playing football.”
His CV is formidable: league titles with Ajax, Juventus and Bayern Munich, a defender schooled at the highest level. The plan is for him to return early in the season. The reality is no one at United can yet be sure what version of De Ligt they will get, or how long his body will hold up.
Put De Ligt, Maguire, Martínez, Yoro and Heaven together and you see why Carrick’s optimism is laced with anxiety. It is a group rich in talent, short on guarantees.
The full-backs offer some flexibility. Noussair Mazraoui, Diogo Dalot and Luke Shaw can all shift inside if required. That versatility might save Carrick in a crisis. It is not a substitute for a settled, robust central pairing.
A thin line between ambition and denial
The unease at centre-back is amplified by the broader picture of United’s summer business.
While their rivals flexed, United dabbled. Manchester City went big on Eliott Anderson for £116m. Chelsea pushed past that with Morgan Rogers at £117m. Tottenham threw heavyweight money at Sandro Tonali (£100m) and Mateus Fernandes (£85m).
United’s main arrival is Youri Tielemans, 29, from Aston Villa, plus Andrey Santos, 22, who managed just 11 league starts for Chelsea last season. Smart deals, perhaps. But not the kind of statement that transforms a backline or calms a manager who knows he is one injury cluster away from a defensive crisis.
For now, there is no plan to strengthen at centre-back unless someone leaves. Five weeks remain in the transfer window. That can change quickly. It probably has to.
Because as things stand, Carrick is heading into the most demanding season of his career with a defensive unit that could either blossom into a balanced blend of youthful energy and hardened winners – or unravel under the strain of injuries, form dips and the relentlessness of four competitions.
The margins at the top of the Premier League are brutal. Carrick has made United hard to beat. The next nine months will reveal whether this defence can make them contenders, or whether it drags his promising start back into the same old doubts.
