A CASEMIRO horror show summed up another abysmal Manchester United performance against rivals Liverpool.

Each of Liverpool’s three goals came as a result of a direct error from a United player, with Casemiro culpable more than once.

Casemiro was hooked at half-time after gifting Liverpool two goals

Kobbie Mainoo gave away the ball in the build-up to Liverpool’s third

Luis Diaz put the Reds in control with two first half goals

Mo Salah had the freedom of Old Trafford to add a third

There is plenty of work ahead for Erik ten Hag

Liverpool dominated United’s mediocre midfield, but they did not need to be at their best to win by three points with ease.

They were so good at dismantling their opponents that they may have had more than three.

United’s answer was lackluster, with Marcus Rashford putting on a pitiful show and Alejandro Garnacho performing well below par.

Noussair Mazraoui is perhaps the only Red Devil who can come out of the match with any credit, although Premier League debutant Tom Collyer also gave a good account of himself despite being thrown in at the deep end.

Erik ten Hag admitted his team were in transition ahead of kick-off and on this evidence United are in for another tough season.

Here is how we rated the Red Devils’ display.

Andre Onana – 5

Nothing he could do about any of Liverpool’s goals and made a few saves to prevent the scoreline from getting worse.

Noussair Mazraoui – 5

Came close to scoring in the first half and looked solid enough against Diaz although he did push up too high before Liverpool’s opener.

Matthijs de Ligt – 4

Left Diaz and Domink Szoboszlai in acres of space for the opening goal but was left in a tricky spot thanks to Casemiro’s error.

Booked for a stun late tackle on Diaz.

Lisandro Martinez – 3

Lost Diaz for the second goal which meant the Colombian was able to score unmarked from the penalty spot.

Also guilty of giving away the ball too easily and was not tight enough with his marking.

Diogo Dalot – 4

Was caught out pushing up too quickly for the first goal and did not do enough to stop Mo Salah’s cross in the build-up to Liverpool’s second.

Looked dangerous in attack at times but too infrequently as he had plenty of defensive work to do since Rashford did not track Trent Alexander-Arnold.

Casemiro – 2

A horror show in the first half as he gave the ball away in the lead up to both of Liverpool’s goals.

He was caught on the ball for the second after a stunning misplaced pass left his defence vulnerable for the opening goal. Hooked at half-time.

Kobbie Mainoo – 4

Fell victim to the Casemiro curse as he was shrugged off the ball in a terrible position, allowing Liverpool to add a third with ease.

Bruno Fernandes – 5

Was United’s most creative spark but that is not saying much. Tried to get his side going in the first half but looked short of ideas and inspiration after the break.

Alejandro Garnacho – 4

Still appears to be a little rusty and has yet to hit the heights he reached last season.

Marcus Rashford – 3

Nothing came off for the out-of-sorts forward who must be running out of chances before he is dropped.

Joshua Zirkzee – 4

Quiet up-front and had little influence on the wing as well, but missed a clear-cut chance with his head and should have turned in Rashford’s cross which he met at the far post.

Subs

Tom Collyer (for Casemiro, HT) – 5

A difficult game for the youngster to make his Premier League debut but he put himself about and won a few tackles.

Harry Maguire (for De Ligt, 69mins) – 5

Shored things up at the back as Liverpool took their foot off the pedal.

Amad (for Garnacho, 69mins) – 5

Provided a spark on the right and looked more lively than Garnacho.

Christian Eriksen (for Zirkzee, 86mins) – N/A

Not on long enough to make an impact.