Blues go through 5-3 in penalty shoot-out
Pedro & Alvaro Morata see red in extra-time
Willian has extra-time penalty call turned down by referee
Wigan shock Bournemouth & Swansea beat Wolves
Dan Burn (73 mins)
Unbelievable scenes!
It feels strange to say it - given they won the FA Cup five years ago - but Wigan are on the way to a big upset as they double their lead, substitute Dan Burn volleying in from Max Power's fine cross.
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Toby Swire: Whatever the problem, Andy Carroll is most certainly not the answer. Michy Batshuayi is better and is already on the books.
Chelsea 1-0 Norwich
Mad scramble in the box!
A mix up between César Azpilicueta and Willy Caballero, the Chelsea keeper spills the ball and Josh Murphy is on it but his shot hits the post.
A let off for the Blues.
Swansea 2-1 Wolves
Dafydd Pritchard
BBC Sport Wales at the Liberty Stadium
Well, that was a lively few minutes.
Wolves seemed to have wrestled control of this match when Diogo Jota scored just two minutes after coming on.
But just a few moments later Swansea have struck again to swing this tie back in their favour.
We have a game on our hands and the crowd, as small as it may be, is enjoying this.
Image source, ReutersWigan 1-0 Bournemouth
BBC Radio 5 live sports extra
Burton Albion defender Stephen Warnock: "The interchanges between Jordon Ibe and Lys Mousset have been a real positive for Bournemouth since Ibe came on - they just seem to know were each other are. Ibe's come on, he's direct, running at defenders, making them make rash decisions, he's done well."
Wigan 1-0 Bournemouth
Nervous moment for Wigan as Benik Afobe's shot drifts just wide of the far post. Very close to an equaliser for Bournemouth.
The hosts have 20 minutes to hang on.
Chelsea 1-0 Norwich
Phil Neville
Former England & Man Utd defender on BBC Radio 5 live
It was a good finish from a centre forward who has to score it.
Batshuayi needs it. We have criticised him in this game but he smashes it across the six-yard box.
It was a really good cross from Kenedy,
Chelsea 1-0 Norwich
Jermaine Jenas
Former Tottenham midfielder on BBC One
He's be a very relieved man, it hasn't gone for him tonight. From Norwich's point of view, they go to sleep. Who's marking the thrower? Michy Batshuayi does what good strikers do, he's got himself into a good position and kept his eye on the ball. He won't have been feeling confident as the ball came to him but he'll be so happy now.
Wilfried Bony (69 mins)
Image source, ReutersWell that didn't last long.
Swansea swiftly regain the lead as Wilfried Bony pokes in after Wolves fail to deal with Tom Carroll's cross.
Michy Batshuayi (55 mins)
Look at his face! Just look at his face!
Michy Batshuayi sidefoots in Kenedy's cross from close range to make the breakthrough.
The relief on his face is clear. He needed that goal.
Chelsea 0-0 Norwich
Jermaine Jenas
Former Tottenham midfielder on BBC One
Michy Batshuayi is lacking in confidence. When he tries to hold the ball in, he chooses the wrong option. His touch isn't good. But you've just got to play yourself out of a bad run. Everyone goes through them.
Wigan 1-0 Bournemouth
BBC Radio 5 live sports extra
Burton Albion defender Stephen Warnock: "It's that man again Ryan Colclough, he's had the better of Ryan Fraser all night, and he's done him again there. He's broken into the box and he probably should have drilled it across goal for a team-mate, but you can't really blame him for shooting."
Wigan 1-0 Bournemouth
Ryan Colclough flashes an effort just across the face of goal as Wigan come forward again.
Jordon Ibe on now for Bournemouth.
Diogo Jota (66 mins)
Wolves are level and you have to say they deserve to be after a strong start to the second half.
Diogo Jota, on the pitch only a matter of minutes, brings a fine ball over the top under control and pings one in at the near post.
Swansea 1-0 Wolves
Heldar Costa breaks into the Swansea box before going down under a challenge. Penalty? Referee isn't interested. Tough to call.
No Video Assistant Referee in this game.
Bright Enobakhare and Rafa Mir then make way for Diogo Jota and Léo Bonatini. Wolves bring on the big guns.
Wigan 1-0 Bournemouth
BBC Radio 5 live sports extra
Burton Albion defender Stephen Warnock: "At this moment in time Bournemouth are slowly building themselves back into the game, but it's still Wigan who look more like scoring, they look so dangerous on the break."
Wigan 1-0 Bournemouth
Gary Roberts arrows one just wide of the far post for Wigan, who really don't look like a side a couple of divisions below their opponents.
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Jon Szeto: You get the feeling that Chelsea recently are a team where the culture in the dressing room is only good when they win. No-one is willing to graft their way out of a slump. Perhaps they lack a Lampard or Terry figure to rile them up and get them going.
Chelsea 0-0 Norwich
Back under way at Stamford Bridge. Things can only get better? They can't get any worse.
A few of the Norwich players really didn't want to come back out into the cold, hesitating and rubbing their hands at the edge of the tunnel.
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Ellis Nordhoff: What a massive win this would be for Wigan. Repeat of 2013? Imagine it.
I'm trying Ellis, I really am...