That's the over Lancashire needed.

Keaton Jennings counter-attacks with a four down the ground followed by a meaty slog over cow corner for six.

Daryl Mitchell's first over ends with 13 more added to the Lancashire total.

Dane Vilas the new man in for Lancashire, who still have plenty of batting depth left despite Jos Buttler's dismissal.

Nine runs taken from Brett D'Oliveira's second over.

Kate Cross
England bowler on BBC Radio 5 live sports extra

Worcestershire won't be settled until they have seen the back of Jos Buttler. He's such a game-changer and can win a game from anywhere.

Is this the moment the game turned in Worcestershire's favour? Liam Livingstone was starting to motor when he was brilliantly caught by Brett D'Oliveira - although it did bring Lancashire's trump card in Jos Buttler to the crease.

The England man is still there, alongside international team-mate Keaton Jennings.

Worcestershire's quarter-final hero comes into the attack for the first time.

Brett D'Oliveira took 4-26 against Gloucestershire and he's a little unfortunate not to pick up a wicket as Keaton Jennings edges one into no-man's land on the off side.

Eight runs from the over - not a bad start from the leg-spinner.

Steven Mullaney
Nottinghamshire captain on BBC Radio 5 live Sports Extra

My money at the moment is with Worcestershire. I think how they play Moeen Ali is going to be a big part of the game - but until they get Jos Buttler out then Lancashire are still in it.

Image source, PA

It is impossible to pick a winner.

Moeen Ali allows only three runs as Lancashire reach the halfway point of their chase, three wickets down and needing 92 to win.

Ed Barnard keeps it fairly tight once more, no boundaries from his second over but eight runs allowed.

One wicket, only two runs allowed.

That is just what Worcestershire needed from Moeen Ali, brilliant bowling from the England man.

Jos Buttler comes to the crease and Moeen Ali prepares to bowl his first over.

Don't you just love Finals Day?

So that's the end of the powerplay, with Lancashire only losing Alex Davies to a run out.

Both sides brought up their 50s off the fourth ball of the sixth over with one wicket down.

Nip and tuck so far.

I love watching Pat Brown bowl.

He strides towards the crease looking for all the world like he's going to throw down something upwards of 80mph, before baffling the poor batsmen with one of about half a dozen cutters at his disposal.

Arron Lilley has a few tricks up his sleeve too though, advancing down the track to cut for four before waiting on the next delivery to hit it straight past Brown and away to the rope.

Good contest, Lancashire 55-1 at the end of the powerplay.

Postpublished at 5 overs

5 overs

Lancashire 44-1 chasing 170

Image source, PA

Lancashire captain Liam Livingstone decides enough is enough and gets on the attack.

He hits Wayne Parnell for four before launching a flat six down the ground.

That's not the end of the punishment for Parnell as his final delivery is lifted high over the square-leg boundary by Arron Lilley for six more.

Matt Woods: Why on earth is Jos Buttler not batting?

Dan Gee: Wayne Parnell should be much better than he is. Always thought when he first appeared that he'd be something special. Don't get me wrong, he's decent, but not special.

Luke Wood is fortunately able to stay in the attack after getting his thumb checked out.

He produces a perfect yorker that keeps Arron Lilley honest before the Lancashire man finally gets off the mark with two down to fine leg.

James Anderson
Lancashire and England fast bowler on BBC Radio 5 live Sports Extra

Image source, Rex Features

Worcestershire have immediately gone for changes of pace and subtle variations and have made it very hard for the Lancashire batsmen to get the pace of the pitch and time the ball.

Arron Lilley is the new man in following that Alex Davies run out.

He can't get off the mark from his first three deliveries faced, the third one a driven into the pitch and back at bowler Luke Wood.

Wood looks in some discomfort after making the stop.