Poor Phoenix are bowled out for just 82 in 94 balls
Spirit field superbly, pulling off two run outs and Dattani & Monaghan completing a relay catch on the boundary
Phoenix reduce Spirit to 26-6 in reply
But Dattani (28*) and Scrivens (26*) combine brilliantly to get their side home with three balls to spare
Defeat means Phoenix miss out on knockouts; Spirit win only their second game
Wednesday's games: Superchargers v Brave women (11:30 BST) & men (15:00); Originals v Invincibles women (15:00) & men (18:30)
Target 83
Charlie Dean and Sophie Luff just keep the score moving along with plenty of singles, which is exactly what they need.
It's all they needed to do from the start really, but for some reason it just wasn't that simple.
Image source, BBC Sport
Henry Moeran
BBC Radio
Birmingham Phoenix have such narrow margin for error and cannot give those extra runs away.
Issy Wong starts with a wide, that also beats Amy Jones and runs away to the boundary.
That is precious for London Spirit. Five runs without the batter even having to hit the ball.
Image source, BBC SportTarget 83
That concludes the powerplay.
What an absolutely bonkers game this is.
Sophie Luff whacks Kirstie Gordon for a lovely boundary to just calm a few Spirit nerves.
This is perfectly placed for a Sophie Luff innings. She is a calm, experienced player who isn't necessarily a big hitter, but can score at a run a ball comfortably - bit like a Joe Root, where you look up and she's already on 20 without breaking sweat.
Spirit will certainly need that today.
The batting has not been great from both teams.
But, the fielding has been absolutely phenomenal.
Target 83
Something is happening every ball at the moment. Who'd have thought all this would be going on in a chase of 83?
Cricket is mad, isn't it?
Spirit 6-3
It's nearly four down!!
Charlie Dean prods uncertainly at the ball from Georgia Elwiss, and the ball plops up just to Elwiss' left as she's following through.
She gets two hands to it but it bobbles out as she hits the ground! Tough chance, but Dean gets a life!
It's all going on!
Target 83
A very welcome boundary for the captain Charlie Dean, edging one unconvincingly past the keeper.
They'll take every run they can get right now!
Abhishek Jhunjhunwala
Former IPL batter on BBC Radio
It doesn't look great for the London Spirit's at the moment.
Target 83
A brilliant start from Emily Arlott. Five balls, no runs conceded and the big wicket of Amelia Kerr.
Spirit are only chasing 83, so the game isn't done and dusted. But wow, what a turnaround.
Daniel Norcross
BBC Radio
This is a superb all round fielding by the Phoenix. This is an extraordinary start!
Kerr c E Jones b Arlott 0 (Spirit 2-3)
What is going on?!?!
Amelia Kerr plays a rather unnecessary shot, trying to whack Emily Arlott over the leg side but it lands safely in the hands of Eve Jones, taking a good catch running in from the boundary.
Who said chasing 83 would be easy?!
Target 83
And breathe.
An absolutely manic 10 balls!
Daniel Norcross
BBC Radio
A big wicket of Mooney and wow! This is how you win impossible games.
Abhishek Jhunjhunwala
Former IPL batter on BBC Radio
Birmingham Phoenix might not be winning with the runs, but they might be winning with the fielding.
Mooney run out Devine 1 (Spirit 2-2)
HUGE wicket!
Sophie Devine is turning the game. It's a risky single as Mooney struck the ball straight at her, and she doesn't hesitate in throwing down the stumps with the batter short of her crease.
It's getting tense for London Spirit! They're only chasing 83!
Oh it's absolute chaos! Has Beth Mooney been run out? It looks very close...
Daniel Norcross
BBC Radio
Brilliantly taken and what a catch that is. An absolutely stunning catch by Devine!