Chelsea's Defensive Woes Exposed Again by Brentford

Chelsea’s soft centre was exposed again. This time, they did not even have the firepower to mask it.

With Joao Pedro ruled out by a knee injury, Xabi Alonso arrived at Brentford without the striker who had been propping up his new, free-scoring Chelsea. The Brazilian’s understanding with Cole Palmer and £117m signing Morgan Rogers had given this side its early-season edge. Remove him, and the whole structure looked fragile. At 3-0 down, it looked broken.

No Joao Pedro, no punch

Danny Welbeck was handed the job of leading the line, the second successive summer Chelsea have turned to Brighton for a centre-forward. On paper, it made some sense: experience, movement, a familiar face for Joao Pedro when both are fit.

On the pitch, it never caught fire.

Welbeck, 35, was neat enough when the ball reached him, but that did not happen often. Seventeen touches in 71 minutes told the story of a striker starved rather than wasteful. Unlike Joao Pedro, who can conjure chances out of tight spaces and broken moves, Welbeck needed service and patterns. Chelsea offered neither.

Joao Pedro came into the weekend with more goal involvements than anyone else in the Premier League – three goals and three assists in four matches – and his influence has stretched beyond numbers. He has been the glue in the final third, linking with Palmer and Rogers, dragging defenders into uncomfortable areas. Without him, the attack lost its shape and, crucially, its threat.

Rogers, so often electric since arriving from Aston Villa, turned in arguably his quietest display in a Chelsea shirt. When Emmanuel Emegha’s ongoing injury pushed Rogers into a central role later on, the shift brought little change. The cutting edge that had defined Alonso’s early weeks simply vanished.

A tight game, then a collapse

For an hour, this did not look like a thrashing. It looked like one of those tight Premier League away days that would be cracked open by a single moment.

That moment belonged to Brentford.

In the 61st minute, Jaidon Anthony rose unmarked to nod in from a corner. Simple. Far too simple. Once again, a Chelsea set-piece unpicked them. Once again, the response was a collapse rather than a reaction.

From there, Brentford did not just edge away; they ran away. Chelsea’s structure sagged, their belief drained, and the hosts were handed the kind of victory that feels routine rather than remarkable. What had been an even contest turned into a 3-0 dismantling.

The pattern is becoming familiar. Chelsea start in the game, concede, and then unravel.

Set-piece scars that will not heal

Alonso inherited a team with a long-standing problem at dead balls. He has not solved it.

Anthony’s header was the fifth goal Chelsea have conceded from set-pieces already this season. Since the start of last campaign, that tally is 23 – more than any other Premier League side. For a club that hired Bernardo Cueva from Brentford two years ago specifically to address this issue, and then replaced him in the summer with another specialist in Austin MacPhee, the numbers are damning.

Levi Colwill, captain for the night, did not sugar-coat it when he spoke to Sky Sports.

“Not good enough. At times we have been bullied in the box and we definitely need to improve,” he said, stressing that the players still trust the new set-piece coach and are adapting to fresh ideas. The message was clear: the plan might be changing, but the execution has to change faster.

Alonso echoed the theme of mentality and detail after Brentford added two late goals to turn a bad night into a bruising one.

“I would say that we have dropped our consistency and our competitive mentality in the second half. We know that small details can be decisive,” he said.

Those “small details” are now shaping Chelsea’s season.

A manager still searching

The defensive record under Alonso is stark. Twelve goals conceded already, more than any other side in the division, even allowing for the fact Chelsea have played a game more. He has become only the sixth manager to see his team ship two or more goals in each of his first five Premier League matches.

One conclusion is unavoidable: he has to stop the bleeding.

Some of this is legacy. The soft underbelly did not appear overnight. But Alonso’s Chelsea do not yet resemble a side with a clear defensive plan. He has chopped and changed systems, handed out 11 debuts, and on Friday introduced two more: 16-year-old Mahdi Nicoll-Jazuli, the youngest player ever to represent Chelsea in the Premier League, and Jordan Henderson, 36, who started against his former club.

This was not the callow Chelsea of recent seasons. This was their oldest starting XI since May 2023, with Henderson, Welbeck and Emiliano Martinez bringing experience and scars. The mentality problem cannot be pinned solely on age anymore.

Alonso insists he is not looking for excuses. “We need to look at each other and know that we have to work and improve because there is still a long way to go,” he told Sky Sports. Right now, though, his team do not look like one that can control a match from first whistle to last. The tactical coherence he is chasing remains out of reach.

Early on, Chelsea simply outscored their flaws. Individual brilliance from Joao Pedro, Palmer and Rogers papered over cracks at the back. At Brentford, with the main man missing and the others subdued, there was nothing to hide behind.

Now comes an extended international break and three long weeks to sit with a 3-0 defeat, a porous defence and an attack suddenly short of ideas. When Chelsea re-emerge, the question will be blunt: can Alonso turn this into a team, or will the season drift under the weight of the same old mistakes?