Jacks went hard at that but it was controlled all the way along the ground.
Invincibles 18-0
Shot!
Right in the slot from Adam Milne and Will Jacks muscles it between cover and the mid-off for his first boundary.
Invincibles 13-0
How has that missed?
Will Jacks looks to hit away, but he toe ends it and it dribbles backwards and just past his stumps.
A slice of fortune.
Invincibles 12-0
A good slower ball from Tom Helm is helped round the corner for a single by Jason Roy.
It has been a rather quiet start.
Invincibles 11-0
First boundary.
Tom Helm drops short and Jason Roy just easily pulls it to the square leg boundary.
That was too easy.
Invincibles 6-0
Will Jacks picks up a couple with a shovel over the covers.
Phoenix 3-0
Just a single from his first five-ball set. This hasn't quite been the entertaining start I hoped for.
Phoenix are buzzing round the outfield too. They are keen to avoid that time penalty.
Post update
Spin from the other end in the shape of 42-year-old Imran Tahir.
He's the oldest player in the tournament, and there's every chance he's sporting the worse barnet too.
Invincibles 2-0
Three dot balls follow.
Superb from Adam Milne. You can see why he's at the top of the MVP rankings. He has been so economical in this tournament so far.
Invincibles 2-0
A single into the cover and a leg bye to start.
Post update
It is going to be the current men's MVP Adam Milne to open up with the ball.
He bowls with some serious heat.
Post update
Will Jacks has hit a 25-ball century before in a 10-over game, and we all know what Jason Roy can do.
Entertain us boys.
Opening batter: Will Jacks
BBC Sport/ECBCopyright: BBC Sport/ECB
Opening batter: Jason Roy
BBC Sport/ECBCopyright: BBC Sport/ECB
What's the forecast?
Don't worry about the weather...
It's cloudy at Edgbaston, but there doesn't seem to be any danger of us having any interruptions.
BBCCopyright: BBC
Post update
When it is Phoenix's turn to bat keep an eye on opener Will Smeed.
He is the latest off the Somerset and King's College production line after Jos Buttler and Tom Banton.
He gave it an almighty thwack on his Hundred debut on Sunday. He was brutal.
Post update
We're going to see Oval Invincibles bat first.
They beat Welsh Fire on Monday thanks to some massive hitting.
Let's hope they can entertain us tonight.
Video content
Video caption: Evans 'slashes' back-to-back boundaries to seal victory for the InvinciblesEvans 'slashes' back-to-back boundaries to seal victory for the Invincibles
How is the tournament shaping up?
We've just got past the halfway point of the men's Hundred group stage.
It is WIDE OPEN...
London Spirit are massively struggling, but the rest are all in with a change of being in the top three and reaching the knockout stages, so every game and every point is going to be so important.
BBC SportCopyright: BBC Sport
The teams
BBC Sport/ECBCopyright: BBC Sport/ECB
BBC Sport/ECBCopyright: BBC Sport/ECB
Birmingham Phoenix won the toss and chose to bowl first
Sam Billings - who says quite adorably says "tails please" - calls incorrectly and Moeen Ali opts to bowl first.
"It's what most teams are doing. I don't have a theory," says Moeen.
Billings fancied a chase too, but he says it is historically pretty 50-50 at Edgbaston so he's not too unhappy.
Live Reporting
Amy Lofthouse and Callum Matthews
All times stated are UK
Post update
Alison Mitchell
Commentator on BBC Radio 5 Live Sports Extra
Jacks went hard at that but it was controlled all the way along the ground.
Invincibles 18-0
Shot!
Right in the slot from Adam Milne and Will Jacks muscles it between cover and the mid-off for his first boundary.
Invincibles 13-0
How has that missed?
Will Jacks looks to hit away, but he toe ends it and it dribbles backwards and just past his stumps.
A slice of fortune.
Invincibles 12-0
A good slower ball from Tom Helm is helped round the corner for a single by Jason Roy.
It has been a rather quiet start.
Invincibles 11-0
First boundary.
Tom Helm drops short and Jason Roy just easily pulls it to the square leg boundary.
That was too easy.
Invincibles 6-0
Will Jacks picks up a couple with a shovel over the covers.
Phoenix 3-0
Just a single from his first five-ball set. This hasn't quite been the entertaining start I hoped for.
Phoenix are buzzing round the outfield too. They are keen to avoid that time penalty.
Post update
Spin from the other end in the shape of 42-year-old Imran Tahir.
He's the oldest player in the tournament, and there's every chance he's sporting the worse barnet too.
Invincibles 2-0
Three dot balls follow.
Superb from Adam Milne. You can see why he's at the top of the MVP rankings. He has been so economical in this tournament so far.
Invincibles 2-0
A single into the cover and a leg bye to start.
Post update
It is going to be the current men's MVP Adam Milne to open up with the ball.
He bowls with some serious heat.
Post update
Will Jacks has hit a 25-ball century before in a 10-over game, and we all know what Jason Roy can do.
Entertain us boys.
Opening batter: Will Jacks
Opening batter: Jason Roy
What's the forecast?
Don't worry about the weather...
It's cloudy at Edgbaston, but there doesn't seem to be any danger of us having any interruptions.
Post update
When it is Phoenix's turn to bat keep an eye on opener Will Smeed.
He is the latest off the Somerset and King's College production line after Jos Buttler and Tom Banton.
He gave it an almighty thwack on his Hundred debut on Sunday. He was brutal.
Post update
We're going to see Oval Invincibles bat first.
They beat Welsh Fire on Monday thanks to some massive hitting.
Let's hope they can entertain us tonight.
Video content
How is the tournament shaping up?
We've just got past the halfway point of the men's Hundred group stage.
It is WIDE OPEN...
London Spirit are massively struggling, but the rest are all in with a change of being in the top three and reaching the knockout stages, so every game and every point is going to be so important.
The teams
Birmingham Phoenix won the toss and chose to bowl first
Sam Billings - who says quite adorably says "tails please" - calls incorrectly and Moeen Ali opts to bowl first.
"It's what most teams are doing. I don't have a theory," says Moeen.
Billings fancied a chase too, but he says it is historically pretty 50-50 at Edgbaston so he's not too unhappy.