Andre Ayew's header hits the post for Swansea City late in the first half
Ayew has a penalty saved by David Raya after 63 minutes
Rico Henry shown a straight red card two minutes later for challenge on Connor Roberts
Ayew makes amends for penalty miss with brilliant strike on 81 minutes
Swansea hold on to take one-goal lead to Griffin Park in the second leg on Wednesday
HT Swansea 0-0 Brentford
Image source, Huw Evans Picture AgencyBrentford had the better of that first half, but this double-chance for Swansea's Andre Ayew and Rhian Brewster was the closest either team came to scoring.
How costly could that miss prove?
HT: Swansea 0-0 Brentford
Comedian Elis James is a huge Swansea City fan, and he's also the host of BBC Wales' podcast, Elis James' Feast of Football.
Here he discusses the Swans' play-off hopes with former Wales internationals Danny Gabbidon and Iwan Roberts.
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HT: Swansea 0-0 Brentford
Ian Walsh
Former Wales striker on BBC Radio Wales
We've seen character from Swansea City teams for years, when they have the bit between their teeth they are very difficult to break down.
But this is a very good Brentford side, they didn't get to the Premier League by the thinnest of margins but that doesn't seem to be affecting them at the moment.
HT: Swansea 0-0 Brentford
Ian Walsh
Former Wales striker on BBC Radio Wales
He [Benrahma] is some player. Fantastic balance and skill, he can't believe he hasn't hit the target with his effort.
There's the half-time whistle.
Brentford have had most of the play but both sides have missed good opportunities to score.
This first leg is nicely poised.
Swansea 0-0 Brentford
A second yellow card of the match and a first for Brentford.
Rhian Brewster breaks forward down the right for Swansea but is cynically bodychecked by Mathias Jensen.
Swansea 0-0 Brentford
Brentford work their way towards Swansea's penalty area and don't seem to be threatening... until Said Benrahma gets on the ball.
He slaloms past a couple of Swansea defenders and gets into the box but he's slightly off balance as he shoots over.
A decent opening for one of Brentford's players of the season.
Swansea 0-0 Brentford
Image source, Huw Evans Picture AgencyRhian Brewster has scored 10 goals for Swansea since joining on loan from Liverpool.
Will he come to rue missing that first-half chance to take his tally to 11?
Swansea 0-0 Brentford
Ian Walsh
Former Wales striker on BBC Radio Wales
He [Brewster] is a yard out, he only has to touch it away from the goalkeeper and it is in the back of the net.
He's headed it straight at the goalkeeper, what a chance that was.
Swansea 0-0 Brentford
Two chances in quick succession for Swansea!
It all starts with a good cross from the left by Jake Bidwell and Rhian Brewster is the first there, but the Liverpool loanee's header is deflected over for a corner.
From that set-piece, Andre Ayew heads at goal but hits the post, before David Raya smothers the rebound from Brewster.
Raya then gets some treatment for a head knock, but he seems fine.
Swansea 0-0 Brentford
Corner for Brentford on the right-hand side and it's a floated cross towards the back post from Mathias Jensen.
Ethan Pinnock get his head on the ball but it bounces harmlessly into the hands of Erwin Mulder in the Swansea goal.
Swansea 0-0 Brentford
Image source, Getty ImagesI wonder what Brentford head coach Thomas Frank is showing his players here?
Thomas Frank's tactics board has a decent ring to it.
Almost as good as Andy Townsend's tactics truck.
Swansea 0-0 Brentford
A sight on goal for Brentford midfielder Christian Norgaard, but his low, first-time effort is comfortably held by Swansea keeper Erwin Mulder.
Swansea 0-0 Brentford
Another chance for Swansea from the left-hand side, as Conor Gallagher stands over a free-kick.
His delivery is overhit and Brentford keeper David Raya catches the ball with a loud cry of "keepers".
Swansea 0-0 Brentford
When Brentford play like this, you do wonder how they managed to lose their final two games of the regular season to Stoke and Barnsley.
Swansea 0-0 Brentford
Image source, Getty ImagesThere's a good tempo to this game, thanks largely to the pace and crispness of Brentford's passing - as well as their pressing without the ball.
Swansea are trying to do their bit for the game as a spectacle too, but it's the visitors who've started brightest so far.
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Swansea 0-0 Brentford
Drinks are done and we're back under way, with Brentford on the attack again.
It's a great run down the left wing from Rico Henry, who crosses perfectly for an unmarked Ollie Watkins, but he heads over and wide.
Ian Walsh
Former Wales striker on BBC Radio Wales
It's fantastic from Gallagher to back heel it to Brewster, it sits beautifully for him but unfortunately it was straight at the goalkeeper.
Swansea's best move.
Swansea 0-0 Brentford
Time for drinks.
It still feels like a cricket match anytime anyone says that.