Gareth Vincent
BBC Sport Wales at the Cardiff City Stadium

Some derby pushing and shoving has raised the tension on the pitch - and in the stands.

The argument started after Ben Cabango's heavy challenge on Robert Glatzel, with the Cardiff crowd then getting on the Swansea defender's back.

Ironically, of course, Cabango was born and raised in Cardiff.

Image source, Huw Evans Picture Agency

Rhian Brewster wins a free-kick for Swansea on the right-hand side of the Cardiff penalty area, and Matt Grimes whips in what could have been a shot or a cross which curls just wide of the far post.

A first proper scrap of the match!

Cardiff striker Robert Glatzel is aggrieved after what he feels was an elbow to his head from Swansea centre-back Ben Cabango.

The two players square up, and then a whole host of other players pile in too.

Ultimately, it's just a bit of pushing and shoving but it got the crowd going.

End result: a yellow card each for Cabango and Glatzel.

A second yellow card of the match, and a first for Cardiff.

Junior Hoilett goes sliding in on Swansea right-back Connor Roberts, who goes down in a heap.

Hoilett into the book.

Big chance for Swansea!

George Byers leads a counter-attack for the visitors, carrying the ball into the Cardiff half and passing to Bersant Celina.

Celina cuts inside from the left side of the penalty area and clips a fine curling shot towards the far bottom corner, but it comes back off the post.

Jason Perry
Former Cardiff player on BBC Radio Wales

Glatzel's movement is causing problems, he's getting into good positions and testing the concentration of the centre-halves.

Image source, Getty Images

Robert Glatzel won't want to see that again.

The Cardiff striker is presented with a decent chance as Swansea's Ben Cabango slides in and misses the ball, allowing Glatzel to spin him and get into the penalty area.

But although he has time to take another touch, the big German is rash and rather snatches at his shot, pulling it well wide of the goal.

Image source, Getty Images

Wayne Routledge has another half-chance for Swansea, picking up a smart pass from George Byers and shooting from the edge of the area - but it deflects wide.

Bersant Celina then whips in a dangerous cross which is only a yard or so away from the back post.

It's been a fast, open start to the game and, save for those sightings of goal for Swansea just now, Cardiff have had the better of the game so far.

Andy Robinson
Former Swansea winger on BBC Radio Wales

Image source, Getty Images

Swansea are under a bit of pressure here, they might just have to ride that a little bit after the first 20 minutes.

Gareth Vincent
BBC Sport Wales at the Cardiff City Stadium

Swansea are trying to get their possession game going here, but it is Cardiff who have had the better of the opening exchanges.

Neil Harris' team are sending the ball forward early and they have already put a number of dangerous balls into the visitors' penalty area.

Steve Cooper's youthful centre-backs have stood firm so far but Swansea need to get hold of the ball to ease the pressure.

Harris will be the happier of the two bosses at this point.

Swansea are really under the pump now.

Cardiff's Lee Tomlin puts in a dangerous low cross, and Swansea centre-back Ben Cabango - born and bred in Cardiff - slides in to clear the ball for a corner.

Cardiff City Stadium is bouncing.

Two chances in quick succession for Cardiff.

Marlon Pack swings in a free-kick, Robert Glatzel heads the ball down and Swansea keeper Freddie Woodman turns it around the post for a corner.

Then, after the corner is cleared, Woodman is called into action again to save Curtis Nelson's header.

Cardiff applying pressure here.

Rob Phillips
BBC Wales Football Correspondent

Image source, Getty Images

Every linesman's flag is being cheered or booed, this is a derby!

Luckily for Swansea playmaker Bersant Celina, there's no VAR at Championship games.

If there had been, he might have been in a spot of bother, with replays showing he had a little kick at Sean Morrison after the Cardiff captain had dispossessed him with a sliding tackle.

Welcome to the south Wales derby, Rhian Brewster!

Swansea's debutant, on loan from Liverpool, lunges in and catches Lee Tomlin and is booked 10 minutes into his first appearance.

Image source, Rex Features

Swansea's Connor Roberts launches a throw into the Cardiff box, and it's poorly defended, with the Bluebirds centre-back Curtis Nelson only helping the ball on to Wayne Routledge at the back post.

Luckily for Nelson, the veteran Swans winger lifts his effort over the bar. He was in a decent position there.

Rob Phillips
BBC Wales Football Correspondent

No posh seats left here at Cardiff today, a bit different to the Carlisle game last week!

Cardiff have the first proper chance of the match, as captain Sean Morrison floats a cross into the box for Robert Glatzel, who's stretching a little as he heads wide.

That brings a big roar of approval from the home fans. They're seriously fired up.

Jason Perry
Former Cardiff player on BBC Radio Wales

Glatzel is an intelligent player, you have to play to his strengths, he had a lot of work to do, he's made contact with the header but not got enough on it. A good start from Cardiff here.