Chris Green just said on the radio: "I never know what to expect from Qais Ahmad's batting."
So, this could be fun!
New batter: Qais Ahmad
BBC SportCopyright: BBC Sport
WICKET
Critchley c Rossington b Wheal (Fire 146-7)
Big swing, gets the edge and Critchley has to go. But it doesn't really matter that much in the context of the game, because Josh Cobb wants to be on strike for the last 10 balls.
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Joe Cracknell will be praying that doesn't cost his team. He's new, he's come into the team. He will want to make up for that desperately.
Cobb dropped on 18
Need 19 runs to win
What. A. Moment!!
It's a straightforward chance for Joe Cracknell, although it did go very high, but he's dropped it. How costly?!
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Josh Cobb stands still and delivers. Important start to the set for the Welsh Fire.
Fire 143-6
Need 21 runs to win
Four more to Josh Cobb! Hammered down the ground.
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
This game is like a tennis match, going one way and then the next. I think it's advantage London Spirit after those wickets. Welsh Fire need boundaries.
Fire 139-6
Need 25 runs to win
Wicketkeeper Adam Rossington takes a ball on the knee which deflects towards the boundary but it's only a single.
Those last couple of wickets probably just shifted the momentum back to the Spirit.
New batter: Matt Critchley
BBC SportCopyright: BBC Sport
WICKET
Higgins c Bopara b Cullen 8 (Fire 138-6)
Great catch! Big moment! He missed the ball before, but doesn't miss out on this one. Sliding along on his knees on the boundary, casual as you like.
Who's winning this one?
Fire 138-5
Need 26 runs to win
Four more!! Ravi Bopara fielding on the boundary leaps, but it goes over his head!
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Roelof van der Merwe has been forced to fire it in faster and he's been smashed away.
Fire 134-5
Need 30 runs to win
That'll help!! Smashed straight down the ground for six!
Momentum back with the Fire?
Fire 128-5
Lots of singles. Fire need a boundary or two ...
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
The game is really in the balance. 52% to 48% in favour of London Spirit.
I think the loss of wickets might just cost Welsh Fire.
Post update
41 runs needed off the last 25.
BBC SportCopyright: BBC Sport
Fire 123-5
Need 41 runs to win
Ryan Higgins leaves his first ball. We didn't quite get the first century, but is that the first leave of The Hundred?
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Good bit of captaincy, good bit of bowling from Mason Crane. It's a big wicket for London Spirit.
Live Reporting
Ffion Wynne and Timothy Abraham
All times stated are UK
Post update
Chris Green just said on the radio: "I never know what to expect from Qais Ahmad's batting."
So, this could be fun!
New batter: Qais Ahmad
WICKET
Critchley c Rossington b Wheal (Fire 146-7)
Big swing, gets the edge and Critchley has to go. But it doesn't really matter that much in the context of the game, because Josh Cobb wants to be on strike for the last 10 balls.
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Joe Cracknell will be praying that doesn't cost his team. He's new, he's come into the team. He will want to make up for that desperately.
Cobb dropped on 18
Need 19 runs to win
What. A. Moment!!
It's a straightforward chance for Joe Cracknell, although it did go very high, but he's dropped it. How costly?!
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Josh Cobb stands still and delivers. Important start to the set for the Welsh Fire.
Fire 143-6
Need 21 runs to win
Four more to Josh Cobb! Hammered down the ground.
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
This game is like a tennis match, going one way and then the next. I think it's advantage London Spirit after those wickets. Welsh Fire need boundaries.
Fire 139-6
Need 25 runs to win
Wicketkeeper Adam Rossington takes a ball on the knee which deflects towards the boundary but it's only a single.
Those last couple of wickets probably just shifted the momentum back to the Spirit.
New batter: Matt Critchley
WICKET
Higgins c Bopara b Cullen 8 (Fire 138-6)
Great catch! Big moment! He missed the ball before, but doesn't miss out on this one. Sliding along on his knees on the boundary, casual as you like.
Who's winning this one?
Fire 138-5
Need 26 runs to win
Four more!! Ravi Bopara fielding on the boundary leaps, but it goes over his head!
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Roelof van der Merwe has been forced to fire it in faster and he's been smashed away.
Fire 134-5
Need 30 runs to win
That'll help!! Smashed straight down the ground for six!
Momentum back with the Fire?
Fire 128-5
Lots of singles. Fire need a boundary or two ...
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
The game is really in the balance. 52% to 48% in favour of London Spirit. I think the loss of wickets might just cost Welsh Fire.
Post update
41 runs needed off the last 25.
Fire 123-5
Need 41 runs to win
Ryan Higgins leaves his first ball. We didn't quite get the first century, but is that the first leave of The Hundred?
Post update
Chris Green
Middlesex all-rounder on BBC Radio 5 Live Sports Extra
Good bit of captaincy, good bit of bowling from Mason Crane. It's a big wicket for London Spirit.
New batter: Ryan Higgins