Right then, that's it from me.
But you can follow all the reaction to this match and the rest of Saturday's action over here.
See you soon!
Lewis Grabban looks to line one up before thinking better of it. Sympathy for the home fans?
That is your lot. A brilliant showing from Alex Neil's men.
Sunderland have got three minutes of added time if they're going to turn it round.
Not looking likely though.
Two more goals in this team then?
It's all Norwich at the minute...
A goal on Duncan Watmore's Premier League debut! It's a pretty ugly one - a shank of his shin - but it bobbles into the far corner.
John Ruddy pounds the ground with his fist.
This Duncan Watmore is full of running but sadly there's little support for him up top.
Most of the other players (and fans) seem to have made their mind up about this one already.
Three goals in under five minutes? Not if Jeremain Lens' terrible corner is any indication.
Gary O'Neil is back in the Premier League - with the seventh club of his career.
Nathan Redmond is the man to make way. He's been excellent. That's Norwich's last change of the match.
There's under 10 minutes to go for Sunderland to find something approaching a decent move now.
The home side are looking seriously flat. A penny for your thoughts, Dick? Do you regret staying on?
Norwich were beating Middlesbrough in the play-off final just three months ago. This team looks very much at home in the Premier League though. Or is it just that Sunderland are that bad?
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Yann M'Vila was sent off on his U21 debut (against Norwich) last week and he'll do well to keep better hold of his temper here.
A bit of silliness with Graham Dorrans sees a few shoves exchanged and the referee decides to let it go.
The last thing Sunderland need is a red card now. Norwich want a fourth.
First real touches for Duncan Watmore and he wins a Sunderland corner. Cue massive cheers from the home fans.
Sebastian Coates rises but his header's cleared. Think it was going wide anyway?
The closest the home side have come in a while though.
Now. I've not seen 21-year-old Duncan Watmore play. Not for Sunderland's youth squad or for Altrincham, or for Clitheroe - where he played on loan.
There's a bit of hype about the youngster, but whether he's the man to turn this one round is really another story though. Just over 15 minutes to go now...
Now Sunderland with a change.
And it's a popular one too. Duncan Watmore, 21, is on for a Premier League debut.
He was Paulo Di Canio's first buy for the club when joining from Altrincham in 2013, moving up five divisions in the process. Steven Fletcher is the man to make way.
Norwich are just coasting here. Again they float through the Sunderland midfield (where's the bite of Lee Cattermole and Yann M'Vila?) before Cameron Jerome drags one wide.
I don't think he really had the technique to pull that off. And here's Lewis Grabban is on to replace him.
BBC Final Score
From what I've seen both last week and this week, I don't think Sunderland are going to stay in the Premier League. Whoever does Match of the Day tonight is going to have a field day. Sunderland have been done there by a rudimentary one-two.
Is Alex Neil shutting up shop now? Bradley Johnson is on for Wes Hoolahan. He's been brilliant today.
There's so much space for Steven Whittaker and Nathan Redmond down the Sunderland left. Every time they look dangerous.
Sunderland are desperate for a goal. A way back in.
This is how Sunderland shaped up in the first half - their average positions.
The question surely should be: Where on earth were their strikers?
Update: They've still not turned up.
Surely there's no way back for Sunderland from this, is there?
Should Billy Jones have a penalty here though? The cry goes up in the stands but on the replay it looks soft.
Meanwhile, Nathan Redmond continues to rampage on the break.
Oh my word. For the second Saturday in a row, Sunderland are three behind.
It's brilliant, fluid, snappy, from Norwich. Nathan Redmond exchanges with Wes Hoolahan on the edge of the box, before stroking it just beyond Costel Pantilimon.
Some of the Sunderland fans are heading home already.
Norwich get their foot on it.
"Calm down lads." Alex Neil is still in control - he is yet to lose an away game since taking over as Norwich boss in January.
Impressive, this 34-year-old. The youngest in the league.
Younes Kaboul - he was signed for his ability in the air, no?
A Sunderland corner, a bit of momentum building, and he clears it out like a pro. Great defending, exactly when the Black Cats didn't need it.
Danny Graham is offside in his first real involvement since coming on at half-time. John Ruddy did really well to get off his line so fast and block anyway though.
Steven Fletcher seems to have picked up a bit of a knock. Premier League debut for Duncan Watmore?
The 21-year-old is warming up in case Fletcher can't continue.
Alex Tettey. Now is there any need for that? With his team two up he clatters into Jermain Defoe - in no kind of space - and picks up a yellow.
So an extra striker on for Dick Advocaat's side. Boy, do they need it - they could do with an extra two.
Jeremain Lens stings the hands of John Ruddy with another banana shot from range - straight down his throat though.
We're back under way at the Stadium of Light.
One change - for Sunderland - Danny Graham is on for Sebastian Larsson.
BBC Final Score
Norwich have played really well so far. Russell Martin's goal was an excellent reaction from him. Steven Whittaker then broke from the right and scored with a super strike.
And it's Norwich who end the first half on the front foot.
Graham Dorrans flashes one wide after a lovely Nathan Redmond nutmeg in the box.
There are boos from the home fans...
Sebastian Larsson thinks so - he charges down Sebastien Bassong not once but twice.
The crowd are on their feet but it's just a Norwich throw at left-back...
Three minutes added on. Is there time?
No momentum left in this half, seemingly. Not that Sunderland had a lot of it anyway. The balls played back to Costel Pantilimon as Norwich defend their turf well.
Bit of a break in play as Robbie Brady gets some treatment.
No arguments from Alex Neil at this stage...
Steven Fletcher almost makes me eat my words. How close was that header from a Jeremain Lens cross? Close indeed. A good position but he was under pressure from his marker though.
Would have been a brilliant time to score. About three minutes to go before the break.
Now there is some noise! Boos from the stands as Cameron Jerome almost adds a third!
Nathan Redmond's cross pings around before reaching the big man - Jerome was off balance as he prodded over though.
Wow. This is not what Sunderland were looking for. Two goals in the five minutes before half-time? Not even one is looking likely.
Where oh where is the Sunderland defence? Steven Whittaker is strong but he just waltzes through Patrick van Aanholt and Younes Kaboul before blazing home.
Glorious start for Norwich.
Sebastian Coates doesn't time this one nearly as well though - Norwich free-kick and Nathan Redmond picks up where Robbie Brady let off by hitting the Sunderland wall.
Costel Pantilimon races off his line to collect the ball as it's pumped back in from deep. He's back in the game.