Invincibles 86-2published at 32 balls to go
Target 107
Spinner Sophie Molineux is back into the attack.
The Invincibles start with a couple of singles.
Invincibles win with 13 balls to spare - Winfield-Hill makes 41 off 38, Capsey hits 20 off 18
Phoenix struggle to 106-7 - Capsey 3-15
Invincibles move up to second as Phoenix drop down to third
Coming up in women's Hundred: London Spirit v Welsh Fire (Wednesday, 15:00 BST)
Josef Rindl and Callum Matthews
Target 107
Spinner Sophie Molineux is back into the attack.
The Invincibles start with a couple of singles.
Target 107
We have a strategic timeout with the Oval Invincibles needing 23 runs off the final 35 balls to win.
Alex Hartley
Former England bowler on BBC Radio
Dane van Niekerk plays the sweep so well. She can literally hit it anywhere from the umpire to behind the wicketkeeper.
Van Niekerk 18, Winfield-Hill 24
And van Niekerk punishes the visitors' sloppiness with back-to-back fours.
Melissa Story
BBC Radio
Amy Jones has destroyed the stumps. Dane van Niekerk is a bit fortunate there because she would have been miles out if Jones gathered clearly.
Invincibles 75-2
She's out of the crease but Amy Jones dropped the ball. Criminal!
Invincibles 73-2
The Invincibles don't need to take any risks so what's this?
Has Dane van Niekerk been run out?
Target 107
34 needed off 40. The hosts are just ticking along.
Georgia Elwiss will bowl the next set.
Alex Hartley
Former England bowler on BBC Radio
Even though Dane van Niekerk is one of the best players in the world, you are gambling on her coming off with her not playing much recently.
Target 107
Dane van Niekerk gets her first boundary, sweeping Maqsood to the ropes.
Alex Hartley
Former England bowler on BBC Radio
The Oval Invincibles are in control of this game.
Target 107
Better from Wong, just three runs off her latest set.
But the Invincibles remain on top, needing 41 off 45.
Alex Hartley
Former England bowler on BBC Radio
The Oval Invicibles have got nothing to lose. Can they go out there and get their net run-rate even higher?
Winfield-Hill 22, Van Niekerk 0
Issy Wong is back into the attack. She starts with a vicious bouncer.
Alex Hartley
Former England bowler on BBC Radio
Van Niekerk will have a point to prove today. Found herself out of the side in the last couple of games and she'll want to get some runs.
Target 107
Dane van Niekerk is in at four.
She's happy to block out the last three balls of Emily Arlott's set.
Arlott by the way has figures of 1-2 off 10 balls. A rare bright spark for the Phoenix.
Alex Hartley
Former England bowler on BBC Radio
The game is almost done and dusted here for the Invincibles. Birmingham Phoenix will need to come up with something really magical if they want to win this. But, never say never.
Capsey c Gordon b Arlott 20 (Invicibles 63-2)
Alice Capsey's brilliant day come to an end as she top-edges one her to Kirstie Gordon behind square.
Muted celebrations from the visitors.
Henry Moeran
BBC Radio
That wasn't a great ball. It was halfway down the track and Winfield-Hill had loads of time to pull that past fine leg.