Gary Neville has warned Ralf Rangnick that Manchester United were lucky to escape with a 1-0 win over Norwich - and is concerned that United will be punished when they come up against better sides.
A second half penalty from Cristiano Ronaldo was enough to make it two wins from two games in the Premier League since Rangnick took the reins on a temporary basis.
Although United left Norfolk with all three points, their performance left a lot to be desired.
In truth, they had David de Gea to thank for their result after a string of exceptional saves from the Spaniard, who twice thwarted ex-Liverpool defender Ozan Kabak late on from point-blank range.
Gary Neville was left concerned by Manchester United's performance against Norwich (Image: GETTY)
And Neville, who was covering the game, has shared his concerns over how United will fare against better opposition; pinpointing the midweek clash with Brentford as an example.
"It wasn't a good performance," Neville said on Sky Sports.
"Against any other team in the league that would have caused them real problems. They go to Brentford on Tuesday night and they have to be better than that otherwise they will get beaten. I do think they will.
"I will be interested to see Rangnick's interview to see whether they've done a hard week of training and if that was a result of this or whether he wanted his players to sit off a bit and not press.
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Manchester United were hoping to mount a title challenge this year (Image: EXPRESS)
"We were told before the first game and all week that United will be high energy and high press. That did not exist today and it will be interesting to understand why.
"The most important thing for United is the three points and clean sheet. He will take that all day long.
"He will see it as a good week but United will have to improve a lot to get anything in the next games."
United now have a favourable run of league fixtures over the hectic festive period.
But they could struggle to take advantage of that kind run of games if they fail to improve on their performance against the Canaries.