Postpublished at 56 mins
Man Utd 0-5 Liverpool
Trent Alexander-Arnold rolls his foot over the ball and Mohamed Salah strikes into the wall.
FT: Man Utd 0-5 Liverpool - hosts humiliated at home
Keita slots home opener
Jota taps in second from Alexander-Arnold cross, before Salah's treble
Ronaldo has consolation goal ruled out before Pogba sent off
Hundreds of United fans leave Old Trafford at half-time
Get involved via #bbcfootball
Shamoon Hafez
Man Utd 0-5 Liverpool
Trent Alexander-Arnold rolls his foot over the ball and Mohamed Salah strikes into the wall.
Man Utd 0-5 Liverpool
Trent Alexander-Arnold the likeliest candidate.
Man Utd 0-5 Liverpool
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Man Utd 0-5 Liverpool
Dion Dublin
Former Manchester United striker on BBC Radio 5 Live
Maybe we were seeing the wrong pictures?
This is incredible. I haven't seen Manchester United players looking so forlorn and clueless.
Man Utd 0-5 Liverpool
It could get even worse for United.
Harry Maguire goes through Diogo Jota and Liverpool have a free-kick on the edge of the area.
Maguire the latest to be booked.
Man Utd 0-5 Liverpool
John Murray
BBC 5 Live Football Correspondent
The Liverpool fans are cheering even more loudly now! When we saw the lines he did look onside.
Man Utd 0-5 Liverpool
VAR has a look...and Cristiano Ronaldo has strayed marginally offside.
The goal is ruled out.
Ronaldo shakes his head and the Liverpool fans cheer that as loud as any of the five goals.
Cristiano Ronaldo
The comeback is on!
No celebration from Cristiano Ronaldo as he cuts in from the left and fires in a superb finish into the far corner.
United pull one back, or do they??
Man Utd 0-5 Liverpool
Two legends with contrasting fortunes.
Sir Alex Ferguson puffs out his cheeks and shakes his head.
Sir Kenny Dalglish laughing his head off.
Man Utd 0-5 Liverpool
Dion Dublin
Former Manchester United striker on BBC Radio 5 Live
My word, Jordan Henderson. He is one yard inside the Manchester United and he plays a ball with the outside of his boot that dissects the Manchester United centre-backs and what a finish.
Liverpool are making it look like a training ground game.
Man Utd 0-5 Liverpool
John Murray
BBC 5 Live Football Correspondent
What a day to remember of the Liverpool fans!
Mohamed Salah (HAT-TRICK)
AND IT'S FIVE, AND IT'S THE HAT-TRICK!
What there ever any doubt about the finish??
Jordan Henderson robs Paul Pogba in the middle of the park and then plays a delightful outside-of-the-foot pass through the defence to Mohamed Salah in on goal.
There was only one outcome, David de Gea comes out but Salah clips a finish into the net.
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Forget the scoreline. United fans wanting to concede more to sack their manager is embarrassing.
James from Bedford
Man Utd 0-4 Liverpool
And they'll have paid good money for tickets to attend this game.
Man Utd 0-4 Liverpool
Dion Dublin
Former Manchester United striker on BBC Radio 5 Live
You can see the whole 'S' in Manchester.
Man Utd 0-4 Liverpool
John Murray
BBC 5 Live Football Correspondent
The second tier in the Sir Alex Ferguson stand looks half empty.
Man Utd 0-4 Liverpool
United losing their discipline completely now.
Seconds into the second half, Bruno Fernandes receives a booking, not for the foul on Curtis Jones but for the chat given towards referee Anthony Taylor.
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We need managerial experience and someone who knows the club. Why not give Brucey the chance he's a club legend and I'm sure he'd get full support from the fans. He's never had the chance to spend money at other clubs. Bring him home where he'd be appreciated.
Rob, Carlisle
Man Utd 0-4 Liverpool
Off we go again.
There's a deathly silence inside Old Trafford.
Man Utd 0-4 Liverpool
Paul Pogba replaces Mason Greenwood at the start of the second half.