Ricardo Vasconcelos slices the first ball for four past short-third man.

David Willey is off the mark straight away with a couple before they scramble a leg-bye.

Before a narrow escape as a beauty flies past the outside edge last ball!

Perfect start for Somerset.

And now Josh Davey with the ball.

Craig Overton with the new ball and Northants have it all to do here.

The last 3 times Somerset have batted first in a T20 Blast quarter-final:

215 today

265 in 2022 vs Derbyshire

209 in 2018 v Notts

Mark Davis
Former Somerset seamer on BBC Radio Somerset

You thought it was a slow, sluggish wicket but that score has put Somerset in a very strong position.

You'd have taken that on a flat one at Taunton.

The biggest groan of the night came for that worst piece of fielding of the night.

Northants really looking rattled.

Can Somerset get past 200?

Yes they can.

Four for Lewis Gregory first ball, then a later late slog sweep behind square from Sean Dickson. Jack White is on a hiding to nothing bowling the last over in fairness.

Shot of the match comes from the penultimate delivery though. I have never, in 15 years of watching Lewis Gregory bat, seen him play that shot, but what a reverse scoop that is, way over the rope for six.

They've chosen to bowl the final over with the short boundary to the leg side.

Interesting decision by Northants.

Ben Sanderson has been great all night but no other bowler has got anywhere near that.

You cannot defend some of these fielding errors.

Already "this would have to be our record T20 knockout chase" is being heard from the Northants end of the press box to my left.

But amidst the carnage of his fellow bowlers, I do want to point out Ben Sanderson has bowled a wonderful T20 spell of four overs 1-23.

He has taken the pace off beautifully.

But last ball of his spell his figures are ruined by another shocker in the field, an easy one, missed, now rolling into the rope, no excuses there on the carpets the professionals play on.

Mark Davis
Former Somerset seamer on BBC Radio Somerset

Somerset are flying.

That was the over they needed to get right back in the innings again.

Top scampering from this pair as always, turning mishits into twos between the boundaries.

David Willey is scythed over short third for four, too much width and with no cover there it was asking for it.

Sean Dickson then pulls out his speciality 'the Dickscoop' or the 'reverse reverse' he has pulled out a few times this year, a different way of getting it over third for four.

Then one more orthodoxly done. Three boundaries behind point on the offside has David Willey shaking his head!

Another Northants misfield is fortunately well backed up by that man Justin Broad again.

Then Lewis Gregory runs two halves, Sean Dickson sends him back which was probably the right call, but Ben Sanderson misfields in his follow through and Gregory gets away with it.

Figures of 1-16 from three overs is top notch from Sanderson.

Dickson joins in fun at Agar's expensepublished at 16 overs

16 overs

Northants v Somerset 169-2

Sean Dickson over backward square leg this time.

Ashton Agar continues to get panned, Somerset not worrying about any spin here, taking the ball on merit all around the ground at will.

A couple of well scampered twos as well, will Northants be able to risk bowling their overseas bowler a fourth over? He has gone for 46 off his first three!

New ball please!published at 15.2 overs

15.2 overs

Northants v Somerset 159-2

Another six out of the ground, Tom Kohler-Cadmore gifting the neighbouring garden an expensive white kookaburra ball there.

Cannot see many watching from the nearby windows, surely there are a few, give us a wave?!

50 for Kohler-Cadmorepublished at 15 overs

15 overs

Northants v Somerset 150-2

Another guided edge between backward point and short third for three from former Yorkshire batter TKC takes him to 52no off 38 balls with four sixes and two fours.

After 17 dot balls, mostly in the first part of his innings, that is some acceleration.

Joe Gibney: Somerset reached 111-1 after 11.1 overs.

Can't beat a bit of numerical symmetry...

Back to seam from the Pavilion End as Jack White is given a third over.

Sean Dickson not coming in and teeing off quite as quickly as he did at the end of many August One-Day Cup games, but look how TKC exploded once he got in - the 50 over skipper will attempt to do similarly.

Lewis McManus' gloves are in front of the stumps by a whisker as Northants appeal for a stumping off Tom Kohler-Cadmore.

That could have been interesting in any group stage game how they would have gone on that decision without technology.

No ball's free hit taken for six by TKC, technology costing Northants big time there as that no ball would have been impossible to spot with the naked eye from square leg.