Manchester United boss Ralf Rangnick felt they were poor for victory over Norwich.
A Cristiano Ronaldo hat-trick saw United win 3-2 on the day.
Rangnick said, "It should actually have been a less stressful afternoon, even more so after we had scored two brilliant goals. Being 2-0 up should have made life a lot easier for us but it didn't because we just didn't defend well enough, for both their goals.
"We could have conceded even a goal earlier on, in two transitional moments, and it is exactly those things that we need to do a lot better in the upcoming games.
“[It was] quite similar to the games against West Ham and Tottenham, the situations were similar so we had to go all in and take all the risks we possibly could. [We chose to] play only with one holding number six with Nemanja [Matic]. A draw would've been a disaster for us, not only with the table but with regards to the atmosphere in the locker room."
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