WATCH: Manchester United humiliated and humbled by Brentford in stunning first-half

Manchester United suffered a sensational collapse in the first-half of their match against Brentford.

United manager Erik ten Hag was hoping for his team to bounce back in style following a 2-1 defeat against Brighton last weekend. 

The Red Devils endured a poor performance against the Seagulls and the Dutch manager was intent on improvement as his men travelled to London for their first away fixture of the season.

Instead of getting a response, Ten Hag watched on in shock as his men succumbed to an embarrassing four-goal deficit after just 35 minutes.

Here are all four goals after a stunning opening half at the Brentford Community Stadium.

Brentford 1-0 Man United: 10" Joshua Dasilva

It's fair to say the first goal was somewhat calamitous, as David De Gea failed to deal with Joshua Dasilva's long range effort.

The shot from outside the box somehow sneaked under the Spaniard and found its way into the back of the net as the hosts took an early lead.

Brentford 2-0 Man United: 18" Mathias Jensen

De Gea didn't cover himself in glory during the second goal either, as his pass to Christian Eriksen forced an error which ultimately led to the second goal.

Eriksen, who moved to Old Trafford from Brentford, was surrounded by his former teammates and perhaps wasn't the right option for United to try and play the ball from the back.

Instead, Mathias Jensen pounced on the error and made it 2-0.

Brentford 3-0 Man United: 30" Ben Mee

There was more calamitous defending on show for the third as Brentford converted a corner into a three-goal lead.

Ben Mee was the eventual goalscorer as United hopelessly attempted to clear their lines.

Brentford 4-0 Man United: 35" Bryan Mbeumo

Bryan Mbeumo delivered a fourth just before half-time after a thunderous Brentford counter-attack.

United appeared to commit too many bodies forward and found themselves in serious trouble as Ivan Toney delivered a dangerous ball just outside De Gea's box.

Mbeumo then proceeded to outmuscle Shaw before finding the back of the net.

READ MORE: Everton manager Frank Lampard calls for patience as Toffees fall to second straight defeat

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