Chelsea’s goalless first half at Brentford offered the impression of control.
The final half-hour exposed something very different.
Xabi Alonso’s side collapsed after Jaidon Anthony opened the scoring shortly after the hour mark, with Igor Thiago and Fábio Carvalho completing a damaging 3-0 defeat.
As covered in ReadChelsea’s Brentford 3-0 Chelsea match report, Chelsea reached half-time level without ever establishing meaningful attacking control.
Once Brentford went ahead, the structure unravelled.
That is becoming an uncomfortable pattern.
Chelsea have now conceded 12 goals across their first five Premier League matches and their league clean-sheet drought has stretched to 21 games.
The problem against Brentford was not simply poor finishing at one end or individual defending at the other.
It was what happened to Chelsea’s structure whenever the game became stretched.
Chelsea’s control disappeared after Brentford opener
Chelsea had 59 per cent possession across the match, but possession alone did not translate into security.
Match data published after the game gave Brentford 2.65 expected goals compared with Chelsea’s 0.82.
The hosts also registered six shots on target to Chelsea’s two.
Those numbers underline an important distinction.
Chelsea saw plenty of the ball.
Brentford created the better situations.
That difference became increasingly obvious after Anthony’s breakthrough.
Brentford punish Chelsea from another set-piece
The opening goal began from an area Chelsea knew would be dangerous.
Mikkel Damsgaard delivered a corner towards Jannick Schuster, who won the aerial contact and directed the ball back across goal.
Anthony converted from close range.
Chelsea had been warned about Brentford’s threat from dead balls before kick-off, something ReadChelsea highlighted in the build-up to the west London derby.
The concerning aspect was what happened after the first contact.
Chelsea’s defensive shape reacted to the initial delivery but failed to control the second phase.
That gave Anthony the decisive opening.
Sky Sports’ post-match analysis also identified Chelsea’s set-piece defending as one of the recurring weaknesses exposed by Brentford.
It is no longer an isolated problem.
Chelsea’s width left space behind the ball
Alonso started with a back three of Wesley Fofana, Maxence Lacroix and Levi Colwill.
Pedro Neto and Valentín Barco operated outside them, while Jordan Henderson partnered Pep Chavarría centrally.
That structure allowed Chelsea to create width in possession.
It also demanded disciplined protection whenever the ball was lost.
As Chelsea chased the game, that protection became increasingly difficult to maintain.
Neto and Barco were encouraged higher.
The centre-backs then had larger spaces to defend when Brentford regained possession.
Kevin Schade and Thiago repeatedly threatened those areas because Brentford were prepared to attack vertically rather than allowing Chelsea time to reorganise.
The issue was not simply that the wing-backs moved forward.
Alonso’s system requires that aggression.
The problem was the lack of control behind them when possession changed hands.
Caicedo absence exposed midfield protection
Moisés Caicedo’s absence also mattered.
Chelsea instead used Henderson and Chavarría in the centre of midfield.
That partnership was capable of circulating possession, but Brentford presented a very different challenge once the match opened up.
Caicedo normally gives Chelsea recovery speed and defensive range in those situations.
Without him, the space between midfield and defence became harder to protect.
ReadChelsea had already identified Chelsea’s dependence on Caicedo after the Arsenal defeat.
Brentford provided another example.
When Chelsea lost possession high up the pitch, the first defensive action did not always slow the counter.
That forced defenders to retreat towards their own goal rather than stepping forward from a stable shape.
Chelsea lost their rest defence chasing the game
Thiago’s second goal demonstrated how quickly Chelsea’s approach became more aggressive after falling behind.
The Blues pushed additional bodies forward looking for an equaliser.
That naturally increased the space Brentford could exploit.
By the closing stages, Chelsea’s attacking shape and defensive shape were becoming disconnected.
Carvalho’s stoppage-time third merely completed the collapse.
Alonso acknowledged afterwards that his players had lost both consistency and the competitive mentality required to manage the second half.
Speaking after the game, the Chelsea head coach said his side were “not being consistent enough to compete during the whole game”.
That assessment fits the tactical problem.
Chelsea can look dangerous when their positioning works.
When the first line breaks, however, the entire structure can become vulnerable.
Bournemouth will test Alonso’s solution
Alonso has already spoken about wanting greater balance.
ReadChelsea highlighted that concern after the chaotic 6-3 Carabao Cup win over Leeds United.
The Brentford defeat showed why that message remains relevant.
Chelsea return after the international break against Bournemouth at Stamford Bridge on Saturday 10 October.
That gives Alonso almost three weeks to work on the problem with the players who remain at Cobham.
The priority is not simply defending deeper.
Chelsea need better protection when attacks break down and greater discipline once opponents escape the first press.
Until that improves, teams will continue to believe there is space to attack behind Chelsea whenever Alonso’s side commit numbers forward.
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