Postpublished at 20 mins
Cardiff 0-0 Swansea
It's a half chance for Cardiff as Jamilu Collins drills the ball into the Swansea box, and Carl Rushworth can only palm it into the path of Ike Ugbo who can't adjust in time to prod into the net.
Substitute Ollie Tanner scores minutes after coming on to give Cardiff lead
Aaron Ramsey doubles Cardiff's advantage from the penalty spot to seal win
Swans still looking for first win under new boss Michael Duff
Bluebirds earn second Championship win this season from six games
Swansea had won the past four meetings of the two rivals
Ian Mitchelmore
Cardiff 0-0 Swansea
It's a half chance for Cardiff as Jamilu Collins drills the ball into the Swansea box, and Carl Rushworth can only palm it into the path of Ike Ugbo who can't adjust in time to prod into the net.
Cardiff 0-0 Swansea
Aaron Ramsey, as you'd expect, has been a lively figure in this contest early on.
Cardiff 0-0 Swansea
Dafydd Pritchard
BBC Sport Wales at Cardiff City Stadium
Cardiff manager Erol Bulut endeared himself to the club's fans by drinking with them in a pub in the Welsh capital this week.
You can tell he's popular among the Bluebirds faithful only a couple of months into his reign, and he's just had a chant of "Erol Bulut's barmy army" from them here at Cardiff City Stadium.
Cardiff 0-0 Swansea
Danny Gabbidon
Former Cardiff City and Wales defender on BBC Radio Wales
Mark McGuinness is very good in the air.
He will win his fair share up against Pedersen.
Cardiff 0-0 Swansea
Arsenal loanee Charlie Patino goes off for some treatment after taking a knock to the head.
He's being patched up by Swansea's medical staff near the dugout.
Cardiff 0-0 Swansea
Aaron Ramsey threads a slick pass through to Ike Ugbo who fires straight at Carl Rushworth.
The offside flag was up anyway.
Cardiff 0-0 Swansea
Danny Gabbidon
Former Cardiff City and Wales defender on BBC Radio Wales
I think the midfield is going to be a key area tonight.
Cardiff 0-0 Swansea
Jamal Lowe does well on the right wing, and his cross is turned behind for a corner.
It's taken by Charlie Patino, but Cardiff manage to clear.
Patino gets a second bite of the cherry and crosses towards Harry Darling, but Jak Alnwick punches the ball to safety.
Cardiff 0-0 Swansea
Andy Robinson
Former Swansea City winger on BBC Radio Wales
Jerry Yates has probably been starved of a bit of service so far this season if I'll be completely honest.
Cardiff 0-0 Swansea
Cardiff get their first chance to attack following a foul from Kristian Pedersen, but Mark McGuinness can only head straight at Swansea goalkeeper Carl Rushworth.
Cardiff 0-0 Swansea
Jerry Yates is bundled over by Mark McGuinness.
Matt Grimes delivers the resulting free-kick into the Cardiff box, but the hosts clear.
No real chances in this one yet.
Cardiff 0-0 Swansea
Andy Robinson
Former Swansea City winger on BBC Radio Wales
It's about controlling those emotions early doors.
Cardiff 0-0 Swansea
Danny Gabbidon
Former Cardiff City and Wales defender on BBC Radio Wales
I like what I'm seeing from Cardiff so far
Cardiff 0-0 Swansea
Manolis Siopis loses the ball cheaply in midfield, but Josh Key can't capitalise.
The pattern of the early stages is very different to what we've seen in this fixture over the last two seasons.
The noise is as incredible as ever, mind.
Cardiff 0-0 Swansea
Dafydd Pritchard
BBC Sport Wales at Cardiff City Stadium
It's buzzing inside Cardiff City Stadium, which is full to the brim, save for the sections cordoned off between both sets off fans.
There's something extra special about a derby played under the lights.
Cardiff 0-0 Swansea
A scrappy start to this one in what is a wild atmosphere.
Manolis Siopis tries to play Perry Ng through on the right but it's out for a Swansea goal-kick.
Cardiff 0-0 Swansea
A late change to the Swansea team as Joe Allen has suffered a groin injury during the warm-up.
He's been replaced by Jay Fulton. Mykola Kuharevich is on the bench in place of Fulton.
What an atmosphere here in Cardiff.
We're underway!
Cardiff v Swansea (19:45 BST)
Iwan Roberts
Former Wales striker on BBC Radio Cymru
Ben Cabango knows exactly what this game is about - he's already had a taste of scoring in this fixture.
A local lad, he grew up watching this fixture.
I'm surprised he's been left out tonight.
Cardiff v Swansea (19:45 BST)
Andy Robinson
Former Swansea City winger on BBC Radio Wales
We both [Danny Gabbidon and I] looked at each other when we saw Ramsey versus Allen in midfield.
It's a great appetite to a game like this.
Cardiff City v Swansea City (19:45 BST)
The most recent meeting between these two sides produced a five-goal thriller.
Joel Piroe and Liam Cullen both netted to put the Swans in command at Cardiff City Stadium before goals from Jaden Philogene and Sory Kaba looked to have earned the Bluebirds a point.
But Ben Cabango rifled home in the ninth minute of stoppage time to earn Russell Martin's men the most dramatic of derby victories.