Tom Curran joins Sam Curran who clips a leg-side single and thinks about coming back for a second to bring up his half-century, but thinks better of it. He's on 49* from 25 balls.

Tom Curran plays and misses at the final ball from George Scrimshaw who finishes with 3-34.

Northants are scrambling to make up time to avoid the cut-off, which would see them have to keep five fielders inside the circle for the last over or two.

As if we needed more drama.

Phil Rowe
BBC Radio Northampton

Just when I was writing them off, the glimmer comes back.

He got them very quickly, almost every ball he faced Laurie Evans hit to the boundary.

They changed the field, went fuller, and George Scrimshaw got another.

Phil Rowe
BBC Radio Northampton

A disappointing over, too far outside of off-stump, but he is batting very well is the Northampton-born-Surrey captain Sam Curran.

We will be disowning him in Northampton.

Justin Broad bowls his final over.

Luke Procter produces a brave head-first slide on the rope to save two runs and restrict Sam Curran to a couple.

The next ball is in the block hole but Curran jams down the bat and gets a streaky edge to the rope to move to 37*.

The next ball is drilled towards Tim Robinson in the deep but takes the Three Feathers into three figures.

Laurie Evans returns to the strike and dabs down into the off-side to bring Curran back on strike, against his home-town team, remember.

Curran drills the penultimate ball of the over, a full toss, down the ground for four to move into the 40s and then wallops the last over extra cover and over the fence for a maximum. He's on 48* from 24 balls. 18 off the over for Surrey.

Four overs to come.

Mark Church
BBC Radio London commentator

It is a great effort, sliding, a brilliant piece of fielding from Luke Proctor.

This should only be two.

Laurie Evans takes advantage of a free-hit to move to six from three balls at the end of the Scrimshaw over.

Sam Curran is on 31*.

Phil Rowe
BBC Radio Northampton

The guy at the other end holds the key to this game, if Sam Curran stays to the end it could be that Surrey have won.

George Scrimshaw's body language tells the tale, but he is overly confident and pumped up there over-stepping.

That could be painful.

Mark Church
BBC Radio London commentator

You can see what that means to George Scrimshaw.

Lloyd Pope takes a very safe catch so a Pope does get a Pope.

Good bottle from Lloyd Pope out there with the crowd behind him.

You can see Ollie Pope screaming no as it comes down inside the rope.

Justin Broad back into the attack to slow things down a touch and Sam Curran carves away into the dep for a single to move to 23* from 14 balls.

Ollie Pope scampers a single after mistiming to mid-on and Curran drives in the same direction but settles for a dot-ball.

Curran takes a mighty swing at the next ball and slices high into the sky with the ball dropping over the deep point rope for his first six.

Good recovery from Broad who beats the bat from the penultimate ball of the over and then slings in a wide one which Curran chops into the deep for a single to move to 30*.

Nine off the over.

Great stuff, this.

Phil Rowe
BBC Radio Northampton

The required rate is 12 for Surrey at the moment who will not worry about that only two wickets down with the batting they have in the hutch.

Image source, Getty Images

Right then, from spin to blistering pace, big George Scrimshaw is tossed the ball.

His first ball is loose and Sam Curran tucks in with a boundary to move to 20* but Scrimshaw almost gets Ollie Pope as he clips just over the grasp of Justin Broad at cover.

Pope runs two and then uses Scrimshaw's pace to punch an extraordinary shot behind point for his fifth four to move to 40*.

Feeling a little ominous for the Steelbacks, here, given the strength of the batters still in the hutch.

82 from 42 balls needed.

Cameron Steel
Surrey all-rounder on Radio 5 Sports Extra

A brave final ball of that over from Pope to Pope.

It was not a bad ball, but he flighted it up and Pope played a good shot and suddenly the gamble over went for 15.

David Willey has a headache now, who can he go to for two overs, or does he go with spin again?

Terrific game of cricket this, finely poised.

We have a spinner in action tonight. Leggy Lloyd Pope is on.

His first ball is cracked to the boundary before Sam Curran brings up the Surrey 50 from the next.

A couple of singles follow before Ricardo Vasconcelos makes a tumbling stop to prevent a boundary, only for Ollie Pope to launch his namesake Lloyd back over his head to finish the over with his second six to move to 34.

Might be a short-lived experiment, that.

Another right-arm medium pacer Justin Broad takes the fifth over and Sam Curran squirts one into the leg side for a single off the first ball.

Four more singles follow off the next four balls as Ollie Pope moves into the 20s before he moves to 25* with a slash over the covers for a very useful and timely boundary.

36 from 19 balls between these two. Nine off the over.

Luke Procter takes the fourth over and after giving up a single to Sam Curran draws a play and a miss from Ollie Pope.

The third ball is cracked straight at the fielder at mid-wicket before a streaky edge for four past the keeper keeps the run of boundaries coming.

Pope carves a single away to move to 19 from 12 balls before Sam Curran dabs to mid-on for another.

Seven off the over. One ball left in the powerplay. Surrey are behind the ask, but it's still early.

Andrew Radd
BBC Radio Northampton

Not a lot you can do about that.

Pope went for a big drive and gets a big edge on it past the keeper for four.

It was a good delivery, so that is still a moral victory for the bowler.

David Willey back for his second over, seeking to give his side a stranglehold on this quarter-final.

He strays a little wide and Ollie Pope gets off the mark with a carve behind point to the fence for another boundary.

Pope scrambles another bye, with Willey unable to produce a run-out with his boot, or hand, this time, before Sam Curran clips off his hips for a single into the leg side.

Pope flashes a cut away to the deep backward point rope as Willey strays wide once more before straying down the leg side and being clipped over the fine leg rope into the crowd for Surrey's first maximum.