Ismaila Sarr drives forward down the left-hand side before having a shot blocked from outside the area.

He gets it back before feeding Joao Pedro, who sets up Edo Kayembe for the low left-foot shot. Ethan Horvath gets down to make save.

Pedro then finds himself running into space with Ismaila Sarr to his right and Keinan Davis to his left. He plays in Davis but his ball across is easily gathered by the goalkeeper.

Watford are having a good spell of possession and controlling the game, Slaven Bilic will want to see his side capitalise on their dominance.

Andy Robinson
Former Swansea City winger on BBC Radio Wales

If you keep on playing left to right, the gaps will open up because fatigue will set in at some point for Cardiff.

Image source, Huw Evans Picture Agency

Swansea are probing with their passing, but it's all a little pedestrian at the moment.

They are definitely missing the quality of delivery Ryan Manning provides.

Great stuff from Cardiff!

Some good possession culminates in a lovely volley by Tom Sang, which Steven Benda has to turn behind for a corner at full stretch.

Encouragement at last for Cardiff.

From the corner Benda loses the ball, but Niels Nkounkou fires his shot over the bar and at that trajectory, into Port Talbot.

Should be 1-0!

Swansea striker Michael Obafemi does everything right as he shows a lovely touch to beat Curtis Nelson but, with a clear sight of goal, he drags his shot wide.

Image source, Rex Features

Gareth Vincent
BBC Sport Wales at the Swansea.com Stadium

Image source, Huw Evans Picture Agency

The early red card has changed the mood of this game.

Cardiff had caused a few problems in the opening stages, pressing high and knocking Swansea out of their stride.

But Callum Robinson's premature exit means the Bluebirds are now being more cautious, allowing Swansea to spend time on the ball - which is just how they like it.

Cardiff's 10 players look like having to put in a big shift thanks to what was a needless sending off.

Luton have responded well to going behind, with Allan Campbell and Luke Freeman going close for the visitors.

Goal scorer Keinan Davis then broke from the midfield and had another go at goal, forcing Ethan Horvath into a brilliant save down to his left.

Ismaila Sarr just went down in the box calling for a penalty after a neat through ball from Davis, nothing doing for the referee.

20 minutes gone at Vicarage Road.

Image source, Getty Images

Cardiff have switched to a 4-4-1 formation with Callum O'Dowda their lone-attacker.

Swansea are continuing to attack, with Luke Cundle's cross cut out by Ryan Allsop.

Andy Robinson
Former Swansea City winger on BBC Radio Wales

The game plan goes out the window now, whatever game plan Mark Hudson had, that has to change.

Swansea are just going to dictate the play now, it's like a training ground exercise it's how clinical Swansea can be and how organised Cardiff can stay.

Swansea are on the attack now, Cardiff are struggling stop their relentless possession.

It's the most blatant red card you will ever see.

He's just completely lost his head.

Now Cardiff must play for basically the whole game with 10 men.

Callum Robinson enters the south Wales derby history books for all the wrong reasons.

Danny Gabbidon
Former Cardiff City defender on BBC Radio Wales

Complete stupidity from Callum Robinson, this is something Cardiff City have had an issue with all season, it's about controlling you emotions.

What is Callum Robinson doing?

He just threw the ball in Ben Cabango's face!

He's sent off, rightly.

Completely unnecessary from the Cardiff forward.

Image source, Huw Evans Picture Agency

Danny Gabbidon
Former Cardiff City defender on BBC Radio Wales

Much better start from Cardiff than we saw on Wednesday night at Loftus Road.

Cardiff have started brightly and Ben Cabango just had to be alert to cut out a cross.

The Bluebirds were, if we are honest, pitiful in the two games against Swansea last season, but they have started well.

First strong tackle comes within 10 seconds.

Matt Grimes on Callum Robinson.

You've got to love a derby.

They're also under way at Vicarage Road.

Referee Darren Bond, who looks shaken, but not stirred by the raucous atmosphere at the Swansea.com Stadium, gets us under way.

What's the over/under on the amount of bad Bond puns I'm liable to do today? It's frightening really, but I suppose writing these live pages is a pretty odd job.

But seriously, the early kick-off doesn't appear to have diluted the atmosphere in Swansea. The stage is set.

A round of applause from all at the Swansea.com stadium as the victims of Aberfan are remembered.