Postpublished at 27 mins
Swansea City 0-1 Cardiff City
Swansea work the ball and Korey Smith has a chance to cross from the right, but his centre is overhit and sails away to safety.
Better is required from the home side.
Swansea City miss opportunity to become the first team to do the league double in the South Wales derby
Aden Flint goal after eight minutes gives Cardiff City victory at the Liberty Stadium
Bluebirds move within four points of the play-off places with victory
Gareth Vincent
Swansea City 0-1 Cardiff City
Swansea work the ball and Korey Smith has a chance to cross from the right, but his centre is overhit and sails away to safety.
Better is required from the home side.
Swansea City 0-1 Cardiff City
Sean Morrison needs some treatment after clashing heads with Ryan Bennett, but the Cardiff skipper looks to be okay.
Swansea City 0-1 Cardiff City
Andy Robinson
Former Swansea winger on BBC Radio Wales
There's no such things as tired legs in a derby.
Swansea City 0-1 Cardiff City
Another set-piece causes a problem for Swansea.
This time Will Vaulks pumps a free-kick long into the box and Sean Morrison gets up well but heads wide of the target.
Swansea City 0-1 Cardiff City
Aden Flint's early goal was his first of the season.
It is also the first one Cardiff have scored in this fixture since Steven Caulker netted the only goal in a Premier League derby back in 2013.
Cardiff have drawn four blanks against Swansea since then, but Flint has put an end to that sequence.
Swansea City 0-1 Cardiff City
Jason Perry
Former Cardiff player on BBC Radio Wales
At the moment Cardiff look very dangerous going forward and we haven't said that for a while.
Cardiff have got at Swansea and made it uncomfortable.
Until this point they've kept their shape and are looking very dangerous on the counter-attack.
Swansea City 0-1 Cardiff City
Conor Hourihane's game is over. He looks to have picked up a knee injury in a block tackle.
Korey Smith is on.
Swansea City 0-1 Cardiff City
Cardiff threaten again as Will Vaulks plays a fine ball to Leandro Bacuna, but his shot is beaten away by Freddie Woodman.
Swansea City 0-1 Cardiff City
Andy Robinson
Former Swansea winger on BBC Radio Wales
I think Hourihane has been fantastic since he's come to the club with goals and energy.
Swansea City 0-1 Cardiff City
Conor Hourihane is soldiering on for the moment, but substitute Korey Smith is being readied in case the Irishman is forced off.
That would be a real setback for Swansea given Hourihane's goal threat.
Swansea City 0-1 Cardiff City
Another Will Vaulks long throw has Swansea worried, but this time Aden Flint nods well over at the near post.
There is more concern for the hosts, with Conor Hourihane getting some treatment.
Swansea City 0-1 Cardiff City
It looked for a moment as though Swansea were settling into this game well, but Cardiff have seized the momentum after scoring from their first attack of any note.
Swansea are now having to defend with Cardiff growing in confidence.
Swansea City 0-1 Cardiff City
Jason Perry
Former Cardiff player on BBC Radio Wales
It's a great save from the keeper but Flint wanted it more. He attacked it, sees an opportunity and wanted it more than the defender, he deserved that.
Aden Flint
A dream start for Cardiff, who take the lead through Aden Flint.
The goal comes from a Will Vaulks long throw which Swansea fail to deal with.
Marlon Pack's initial effort is well saved by Freddie Woodman, but the towering Flint is on hand to head in the rebound.
Swansea City 0-0 Cardiff City
Jason Perry
Former Cardiff player on BBC Radio Wales
You can see Mick McCarthy animated there. There were two balls on the pitch, and he's saying "you allowed this to go on and now you've given the free-kick."
Swansea City 0-0 Cardiff City
The first shot of the evening comes from Swansea.
It is a free-kick from Conor Hourihane which is pushed wide by Dillon Phillips.
Swansea City 0-0 Cardiff City
Jason Perry
Former Cardiff player on BBC Radio Wales
Interesting that left hand side, Joe Ralls at left back and Ciaron Brown left centre-half but they've settled well and Cardiff have been the team on the front foot.
Swansea City 0-0 Cardiff City
A first long ball of the day is pumped towards Kieffer Moore, but Swansea defender Jake Bidwell does enough to snuff out the danger.
Swansea City 0-0 Cardiff City
Under normal circumstances, the Liberty would be a cauldron of noise right now.
Instead all you can hear is the players' shouts. Predictably, perhaps, it has been a fairly scrappy opening.
Swansea City 0-0 Cardiff City
After a minute's silence in memory of Welsh victims of Covid-19, we are off and running in the derby.
Cardiff's Harry Wilson gets us under way.