Why Does 3-4-3 Work for Crystal Palace but Not Man United?

The 3-4-3 formation has re-emerged as one of the Premier League’s most divisive systems.

Oliver Glasner has the Eagles flying with it. His Crystal Palace side are organised, aggressive and unbeaten this season in 3-4-3.

Meanwhile, Ruben Amorim refuses to deviate from 3-4-3 at Manchester United, despite having more losses than wins after 49 games in charge. The contrast has raised an obvious question: is the formation flawed, or just the way one manager is using it?

Which Premier League teams use a 3-4-3 formation?

In the Premier League, systems often overlap, but only a handful of managers use a 3-4-3 as their primary structure. Amorim at Man United and Glasner at Crystal Palace have been the two most notable adopters in recent seasons.

Antonio Conte also famously used a 3-4-3 at Chelsea when they won the title in 2016/17, proving the shape can succeed at the highest level when the right profiles are in place.

Other teams occasionally resemble a back three when building play. But while many systems flex in and out of back fours, only Palace and United currently commit to a 3-4-3 as their default, week-to-week identity.

Why do Manchester United play with a 3-4-3 formation?

Ruben Amorim arrived at Old Trafford in November 2024 with a clear idea of how he wants football to be played. He dominated Portugal with a 3-4-3 at Sporting Lisbon, where he won three Primeira Liga titles and 71% of his 231 matches. He believes the system offers balance: three centre-backs for security, two central midfielders to control transitions, wing-backs to stretch the pitch, and inside forwards to press and combine.

He walked into United determined not to change his principles. He inherited a squad built for various back-four coaches, yet he immediately imposed his system. In Portugal, his structure worked because the profiles were aligned to it. At United, the same plan has produced only a 36.73% win rate after 49 games in all competitions.

What has Ruben Amorim said about his 3-4-3 formation?

Amorim has repeatedly defended his approach. Speaking in March, he said: “It’s quite simple. We talk about the system — the system is not the problem, it’s the way of playing. Every system needs different characteristics, but I have one idea and I will not change that, no matter what.”

The formation is part of his footballing identity. He argues that execution and mentality are the root of United’s issues, not the shapes on a tactics board.

His in-game decisions reinforce his loyalty to the system. When United chase late goals, he tends not to change shape. Instead, he reassigns roles within the 3-4-3. That is how Mason Mount or Bryan Mbeumo have ended matches as wing-backs. To him, the framework must bend only slightly, not break entirely.

Why does the 3-4-3 formation not work for Man United?

At United, 3-4-3 breaks its own rules. Bruno Fernandes has played much of this season in the double pivot alongside either Manuel Ugarte or Casemiro. Bruno is attack-minded by instinct. Ugarte and Casemiro can break up play, but neither has the legs to cover their captain’s forward movement and then recycle possession at pace. The result is a midfield that is easily outnumbered and cut through during transitions.

Wing-back is another weak point. The role requires players who can defend one-on-one, run the channels repeatedly and arrive high up the pitch to deliver. Palace have two perfect candidates in Daniel Munoz and Tyrick Mitchell. On paper, Diogo Dalot and Patrick Dorgu — who was the first player to move to Old Trafford as part of Amorim’s £250 million transfer spend — also appear to fit the wing-back profile, but it has not yet worked out for either.

Higher up the pitch, United’s forwards often drop to receive in similar areas. Without a Jean-Philippe Mateta-type striker pinning defenders and stretching the line, centre-backs step out and compress the space. United then build slow horseshoes of possession, and when they lose the ball the defence is exposed. One wing-back is high, the other tucked, and the back three are dragged across too much ground.

Amorim will be hoping that Benjamin Sesko — who joined from RB Leipzig in August for £74m in what was a record-breaking transfer window for Premier League clubs — can transform his team by leading from the front, but it has been a slow start for the Slovenian so far.

Why does the 3-4-3 formation work well for Crystal Palace?

Glasner’s version is built around the demands of the system. Munoz and Mitchell are excellent defensive athletes who can handle the entire flank. They are comfortable in duels and quick enough to recover, which allows the back three to stay compact rather than chase into the channels.

In midfield, Adam Wharton dictates from deeper zones but still plays forward early. His partners — Will Hughes, Daichi Kamada or sometimes even Jefferson Lerma — rotate responsibilities so the pivot always has legs and balance. Palace don’t panic without the ball, which keeps the distances tight and the five-man line intact.

Further forward, Palace attack vertically. Eberechi Eze played a big part in making the structure work last season, but after his summer move to Arsenal the shape has adapted rather than regressed. Ismaila Sarr has stepped into the half-spaces and drives at goal rather than hugging the touchline. Mateta stretches defences by constantly running behind. His movement creates lanes for others.

Palace also accept games where they don’t dominate possession. They compress the middle third, wait for the right moments to press and break with purpose. That pragmatism helps the structure hold, even against supposed better teams.

Why are Crystal Palace better in a 3-4-3 formation than Man United?

The difference is profile and discipline, not shape. Palace use players who match each positional demand. Their wing-backs defend like full-backs and attack like wingers. Their midfielders complement each other. Their forwards stretch rather than crowd. Their back three hold position because they trust the players outside them.

United, by contrast, cram big names into roles that don’t suit them. Fernandes is wasted — and exposed — deeper. Casemiro and Ugarte can’t shuttle and progress at Premier League tempo. In the front line, too many forwards want the ball to feet, with players like Mount and Matheus Cunha naturally drifting towards possession rather than stretching the back line.

When Palace lost Eze they tweaked the roles within the system, whereas United seem to bluntly force a rigid system around whoever is available.

What do Man United need to change to make the 3-4-3 formation work?

They may not need to abandon it entirely, but they need to feed it the right ingredients.

Moving Fernandes higher, into the right inside channel, would remove a defensive liability and give the front three more creativity. Meanwhile, pairing Ugarte with a more mobile midfielder — Kobbie Mainoo would seem an obvious candidate — would restore balance and energy in the centre of the park.

Recruiting or repurposing proper wing-backs is also essential — or temporarily switching to a back four when the bench doesn’t provide them.

They also need a forward who stretches defences and will be hoping Sesko becomes that man once he finds his feet in England, although Mbeumo — who has been predominantly used on the right side of United’s three-man attack — must also keep striving to get beyond the last defender if Amorim’s 3-4-3 obsession is to bear fruit.

Will 3-4-3 ever work for Manchester United?

It could — but not like this. Conte proved in 2016/17 that a Premier League team can win with 3-4-3 when it is built around specialist roles.

Glasner is proving its potential again, with Palace showing the system itself is not outdated or naive. It works when the profiles match the principles.

Until United fix the profiles, 3-4-3 will continue to look like a theory rather than a plan. But the formation isn’t broken. Manchester United’s version of it is.