Manchester United legend Paddy Crerand has warned Sir Alex Ferguson's current crop that they must concentrate for the full 90 minutes to ensure they beat Norwich at the weekend.
United were guilty of concentration lapses during Tuesday's shock draw against relative minnows FC Basel in the Champions League.
The Red Devils were 2-0 up before Basel fought back to to snatch a lead in the final stages at Old Trafford.
However, Ashley Young salvaged a point for the Barclays Premier League champions in stoppage time in order to spare some significant blushes.
Up next for United are the Canaries on Saturday, with the reigning champions looking to atone for their recent errors with three points in front of their own fans.
And Crerand hopes to see United show the sort of composure that was in abundance at the start of the campaign.
"The Premier League is a top-class football league and if you do anything daft you’re going to get punished," he told ManUtd.com. "It’s the same in Europe – you need 100% concentration all the time.
"I never thought for one minute that Basel would get a result at Old Trafford, never mind score three goals. So you have to be alive all the time.
"Norwich are a young team who’ve come up to the Premier League and we saw the surprises Blackpool produced last season. They beat Sunderland last time out so they’ll be confident.
"You can’t win every game at home, no matter how well you’re playing, but I think United should get the points because we’re under a little bit of pressure from Manchester City.
"Sir Alex will make changes – he used a few experienced players against Basel and it’ll be interesting to see who’s fit for this weekend."