Postpublished at 14:03 Greenwich Mean Time 10 January 2021
Bristol City 1-0 Portsmouth
Here's that Famara Diedhiou effort.
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Also listen to commentary from BBC Radio 5 Live Sports Extra & BBC Radio Lancashire
Chelsea are ninth in the Premier League, Morecambe are seventh in League Two
Chelsea, who were beaten finalists last year, are eight-time winners - last in 2018
Morecambe, who have beat Maldon & Tiptree & Solihull Moors to reach this stage, have never progressed past the third round
Callum Matthews
Bristol City 1-0 Portsmouth
Here's that Famara Diedhiou effort.
Chelsea 1-0 Morecambe
Chelsea recycle the play from a corner and work it wide to Cesar Azpilicueta.
Morecambe defender Nat Knight-Percival reaches his cross before Antonio Rudiger but the rebound falls to Timo Werner who can't control his volley and it flies over.
Crawley Town 0-0 Leeds United
Leeds want a penalty for a shove in the box on Rodrigo, but those shouts are waved away. He was clipped, did Crawley get away with that?
Bristol City 1-0 Portsmouth
A couple of half chances for Portsmouth, but John Marquis can't quite get a strike off in the area and moments later Marcus Harness heads wide from a deep cross.
Chelsea 1-0 Morecambe
Kai Havertz is a relieved man.
Under no pressure, the 21-year-old misjudges his header from Ryan Cooney's long throw and needs Kepa to touch it away to prevent a horror own goal.
There's uncertainty in the Chelsea defence if Morecambe fancy having a go.
Man City 2-0 Birmingham City
Phil Foden produces a delightful Cruyff turn in controlling Gabriel Jesus' cut-back, but he can't add the finish as he sends his first-time shot well wide of the goal.
Relentless from Manchester City.
Crawley Town 0-0 Leeds United
Neat little nutmeg from Pablo Hernandez into the path of Helder Costa, but the Leeds forward has his heels clipped and Crawley can get back behind the ball.
The hosts haven't enjoyed too much ball around the Leeds box and Jack Powell is squeezed out after a loose touch in the area.
Man City 2-0 Birmingham City
Two goals in seven minutes from Bernardo Silva, who will surely be rather disappointed if he doesn't take the match ball home at the end of this one.
No attempts on goal of any kind from Birmingham after 20 minutes in Manchester, but Aitor Karanka's side have just begun to press a bit more aggressively in the past few minutes.
Chelsea 1-0 Morecambe
He's had a few sighters already and Emerson again goes close to extending Chelsea's lead.
He really pummels his drive from distance and Mark Halstead does really well, plunging to his left to keep it out. Timo Werner looks to convert the rebound but is flagged offside.
Crawley Town 0-0 Leeds United
Crawley are doing a good job of keeping Leeds at bay so far. The Premier League outfit have plenty of bodies swarming forward and have enjoyed 74% of possession, but have been greeted by a red wall every time the ball goes into the box.
Chelsea 1-0 Morecambe
Antonio Rudiger ambles up for a corner for Chelsea and probably should double their lead, volleying Hakim Ziyech's dangerous corner high over the bar from six yards.
Chelsea in complete control at the moment.
Chelsea 1-0 Morecambe
Mark Schwarzer
Former Middlesbrough & Fulham keeper on BBC TV
It is a wonderful strike with very little backlift - I think he just catches the Morecambe side out. I don't think they expected him to shoot and they were a little bit slow to get out to him.
The keeper is a little bit unsighted and it picks up pace the closer it gets to goal.
Cheltenham 0-1 Mansfield
Here's Stephen McLaughlin's opener for Nigel Clough's Mansfield.
Hosts Cheltenham have gone close to an equaliser on a couple of occasions, but the Stags remain in front against their fellow League Two side.
Famara Diedhiou (20 mins)
What a strike!
The first moment of real quality in this game as Bristol City open up the Portsmouth with a wonderful move.
Famara Diedhiou plays a lovely one-two around the corner with Hakeeb Adelakun, cuts inside a defender and finishes superbly. Great goal.
Man City 2-0 Birmingham City
Stephen Warnock
Ex-Leeds and Liverpool defender on BBC TV
It is outstanding, absolutely outstanding football.
What a pass from Riyad Mahrez to find the run of Kevin De Bryune - it's unbelievable.
Bernardo Silva was never going to miss from there.
Bristol City 0-0 Portsmouth
No real chances for either side in this one yet, both working each other out in the opening 17 minutes. Portsmouth are enjoying some good possession though and ione such move ends with Marcus Harness lashing over from outside the box.
Mason Mount (18 mins)
Morecambe's resistance is broken inside the first quarter and it's a lovely strike from Chelsea's birthday boy.
The ball is worked to Mason Mount 25 yards out. He takes aim and whistles a terrific shot into the bottom corner, leaving Mark Halstead with no chance.
Barnsley 0-0 Tranmere
Conor Chaplin wriggles in behind the Tranmere defence and buries a low shot past Scott Davies.
The flag goes up though and the goal is chalked off.
Bernardo Silva (15 mins)
Just lovely football.
Riyad Mahrez plays a lovely ball to the byeline for Kevin de Bruyne, who cuts it back to the six-yard box, where Bernardo Silva is waiting to pounce.
It's a simple tap-in at the end of another brilliant team move.
Birmingham City are in trouble.
Crawley Town 0-0 Leeds United
Martin Keown
Former Arsenal defender on BBC One
I really like the movement of these Leeds players, they boss possession these days.