And that's it. An easy win for Manchester United in the end.
Marcus Rashford at the double.
Juan Mata could cap off a good performance with a goal here...
Lovely touch to tee up a shot inside the box, but he fires into the side-netting from a tight angle.
Former Chelsea and Scotland winger on BBC Radio 5 Live
De Gea's save just before half-time (when the game was 1-0) was a big moment but having said that they have been in such control for most of the game it would be unfair to say that got them the win.
They were creating chances, they got better in the second half and i just don't see any way they could have stopped Rashford. He was on such, such good form.
Angel Gomes wriggles forward and slips a pass into Daniel James' path, but his cross is deflected behind. United go short and look to cling on to the ball.
Last couple of minutes at Old Trafford. Ole Gunnar Solskjaer will want that clean sheet...
A touch for Angel Gomes, who finds fellow teenager Mason Greenwood and he knocks it back to another teenager in Brandon Williams.
Norwich are mounting some late pressure here. The game is gone, but the Canaries are trying to give their supporters something to hang on to for that long old trek home...
Buendia's cross is overhit though.
Todd Cantwell is knocked over by Harry Maguire in the box, but Big Brother says no penalty.
VAR is always watching...
Former Tottenham Hotspur striker on BBC Final Score
They’ve played a poor Norwich side. United still have a lot of work to do.
Mata has been excellent today, Rashford has also been good.
BBC Sport at Old Trafford
The game was won long ago and the United fans in the Stretford End have started protesting against owners the Glazers and executive vice-chairman Ed Woodward.
Clearly unhappy with how the club is being run, there have been loud chants of protestation for around 20 minutes now.
"We want Glazers out, we want Glazers out," is the only printable one.
Emiliano Buendia fancies a dig. But curls it harmlessly over David de Gea's crossbar.
Chance for Norwich with a free-kick about 30 yards out...
Anthony Martial gets a rest.
Another United youngster gets a run out... 19-year-old Angel Gomes.
Lovely finish from the youngster!
Norwich allow Mason Greenwood far too much time to take the ball down, work a bit of space and drive a low left-footed effort beyond Tim Krul from the edge of the box.
The 18-year-old picks the bottom corner out superbly. It all seemed so simple for him.
Think that was his first shot of the game...
Daniel James slips through the gears and accelerates down the line, before being bundled over by Onel Hernandez. Feels like the only way to stop the diminutive winger sometimes...
It's nice soft landing for the Welshman, mind. The rain is hammering down in Manchester.
Another change for United - Andreas Pereira heads off, Mason Greenwood comes on.
The Old Trafford faithful are making plenty of noise, but the game itself has gone a little flat.
Fred and Alexander Tettey exchange angry words after a collision in the middle, and Norwich win the free-kick.
Fred flicks a ball forward towards Juan Mata, who is never going to win a battle for the ball in the air with Norwich goalkeeper Tim Krul...
Double change for the visitors - Ibrahim Amadou and Onel Hernandez come on, with Adam Idah and Mario Vrancic making way.