De Bruyne with low free-kick under the wall
Unmarked Sterling with header for second
Cardiff's Bennett booked for tackles on Sane & Diaz
FT: Chelsea 3-0 Newcastle
Fifth-round draw in the One Show on BBC One on Monday - 19:00 GMT
Cardiff 0-2 Manchester City
Pep Guardiola is not happy. He's marched over to the officials to tell them what he thinks to some of those tackles from the Cardiff City players.
Leroy Sane, who had to go off at half-time, was lucky not to have his leg broken while Sergio Aguero and Brahim Diaz had a few nasty knocks in the second-half.
Cardiff 0-2 Manchester City
Manchester City are through to the fifth round of the FA Cup. They just had far too much quality for Cardiff City today.
Goals from Kevin de Bruyne and Raheem Sterling did the damage in the first half.
Image source, Getty ImagesCardiff 0-2 Manchester City
Now this is a sad end to the game. Joe Bennett, who many thought should have been shown a straight red card in the first half, has just received his second yellow card and is off.
It was a nasty tackle on young Brahim Diaz.
Image source, ReutersCardiff 0-2 Manchester City
Sergio Aguero really, really wants to score and this was his best chance.
He has space and time to lift his leg back and pull the trigger but he puts way too much behind it and his strike flies miles over the bar.
Image source, ReutersCardiff 0-2 Manchester City
Bernardo Silva - who has had a bright game for Manchester City - is coming off as young Brahim Diaz comes on for just his sixth senior appearance.
Cardiff 0-2 Manchester City
Manchester City are not finished yet.
Ilkay Gundogan pokes one through the middle to Danilo - who made a darting run into the centre of the box - but his strike is straight at Neil Etheridge and it bounces away to safety.
Image source, ReutersCardiff 0-2 Manchester City
Manchester City are nearing 600 passes. They've currently played 580 with an accuracy of 87%.
Cardiff's direct play means they have been far less accurate. The Bluebirds have played 181, completing 63%.
Looking after the ball is about to win the day.
Image source, Getty ImagesCardiff 0-2 Manchester City
Liam Feeney has looked really bright since coming on.
He twists and turns and tries to get away down the right but is just about stopped in his tracks.
Manchester City then break forward with pace but Bernardo Silva's effort is a tame one and it's straight into the hands of Neil Etheridge.
Image source, Getty ImagesCardiff 0-2 Manchester City
Laim Feeney does so well.
He skips past a challenge from Sergio Aguero in the area and chips it into the middle but it's deflected off a Cardiff player and out for a goal-kick.
#bbcfacup or 81111 on text
Expected Cardiff to give us a good kicking, but not this good.
Derek, Holland
Cardiff 0-2 Manchester City
Fernandinho stops Marko Grujic in his tracks and he receives a booking for it.
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Richard Pettinger: Sane should have been sent off for bashing Bennett on the studs with his shin.
You do you, Richard.
Cardiff 0-2 Manchester City
Neil Warnock is trying his best to change things for the hosts.
Liam Feeney is on for Nathaniel Mendez-Laing.
Cardiff 0-2 Manchester City
Sergio Aguero is rolling around in the middle following a challenge from Bruno Ecuele-Manga.
The Cardiff player was very late there and he's received a yellow card for it. Aguero is still in some pain.
Image source, ReutersCardiff 0-2 Manchester City
Wow! That was a sensational pass from Kevin de Bruyne.
He plays it straight through the middle with perfect weight and it almost fell for Raheem Sterling but Neil Etheridge is out quickly to snuff out the danger.
Image source, ReutersCardiff 0-2 Manchester City
Kevin de Bruyne tries to create an opening for himself with a bit of trickery on the edge of the box.
He steps onto his right and fires a shot but it's blocked and now Cardiff can counter-attack.
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Johnny: Fernandinho is brilliant. Very rarely spoken about by pundits and fans but he’s always making important runs, vital interceptions and pretty much never misplaces a pass. If you want stability, humility and reliability then get yourself a Fernandinho.
Jack: Not saying Cardiff's striker Zohore is tired but they just had to scrape him off the pitch when they substituted him.
Image source, AFPCardiff 0-2 Manchester City
Sean Morrison is the target at the back post and he hits it back across goal as the Cardiff players wave their hands appealing for handball.
Referee Lee Mason waves it away and Manchester City regain possession at the back following another set-piece.
Cardiff 0-2 Manchester City
Cardiff have had a few moments in the last 10 minutes but they are still yet to really carve out a clear-cut chance.
If they are to get back into this game, they need a goal soon.
They have a corner now...
Cardiff 0-2 Manchester City
What a goal that would have been!
David Hoilett could not have hit it sweeter as he hit an unstoppable strike from 25 yards out.
It just skims over the bar but Claudio Bravo wouldn't have saved that.
Image source, Reuters