Thrilling match ends in a tie with both sides scoring 138
Tom Curran, who hit an unbeaten 38, judged to have made his ground for two off final ball
Cox hits 51 for Invincibles
Fire opener Clarke brings up fifty off 38 balls and ends unbeaten on 69
Atkinson stars with three wickets for Invincibles
It's all going on!
Successive thick edges from Jordan Cox and Will Jacks off the bowling of David Willey are cut off at third by a diving Haris Rauf at third. Cox's shot just about evades a diving slip on the way through.
Jacks then skies to mid-wicket - it should be caught by Ben Green running round... but he's dropped it! And to make matters worse the ball dribbles onto the ropes for the first four of the match.
Jordan Cox takes two into mid-wicket to get the Invincibles off the mark.
No wickets in successive deliveries for Shaheen this time.
A full toss onto the pads and new batter Jordan Cox plays into mid-wicket.
Roy c Phillips b Afridi 0 (Invincibles 0-1)
It looks like it has!
Roy is walking off and Shaheen has a wicket with the first ball of the innings once again.
Look out indeed!
A full toss, Roy jams his bat down and the ball flies to a diving Glenn Phillips at backward point.
The only question is whether it has carried. The umpires have elected to take a look.
The teams are out on the field and Shaheen Shah Afridi is lobbing a few dummy deliveries to his colleagues.
The Pakistan seamer opened his tournament with two wickets in two balls against Manchester Originals. Look out Jason Roy?
Thanks Tom.
For the record, teams batting first in this competition average 142 at The Oval. But teams batting second would be expected to rack up 161, so Invincibles will fancy their chances.
That feels a little below par from Welsh Fire, but they would have been a lot worse off without those vital contributions from Joe Clarke and Ben Green.
Here to guide you through the Invincibles reply is Mike Peter.
Shaheen Afridi goes for a huge heave with the final ball of the innings that disappears over the wicketkeeper and plugs in the surface.
Fire manage to run two and reach 138-6 from their 100 balls, meaning Oval Invincibles need 139 to win.
Shot! Joe Clarke has mullered a delivery from Sam Curran back over his head and over the rope for six.
That was a huge shot. Where would Fire be without Clarke?
Green c Cox b T Curran 25 (Fire 128-6)
Caught in the deep!
Ben Green's spritely innings comes to an end as he clubs the ball straight to Jordan Cox, who takes a smart catch at deep mid-wicket.
There's the ramp shot!
It is beautifully played by Joe Clarke as he lofts the ball over the wicketkeeper and away for four.
Clarke is 66 from 44 balls.
Zak Chappell has taken a credible 1-15 from his 20 balls, that's a fine effort.
Tom Curran returns as we enter the final 10 balls. Where can Fire get to from here?
This has been a brilliant, gutsy innings from Joe Clarke.
The Fire opener charges Zak Chappell and clatters the ball through the covers for a one-bounce four to bring up his half-century.
Gus Atkinson is pushing 90mph again as he returns to the attack looking to add to his three wickets.
Joe Clarke is not intimidated though as he takes on a rapid bouncer and pulls the ball away for four to move to 48.
This is turning into a handy knock from Ben Green, who clubs his second six of the innings to move on to 19 from just 10 balls and bring up Fire's hundred.
One last push needed to try and get up to a competitive total.
We have a crowd catch this time - and its a special one!
Joe Clarke heaves the ball into the stand and a fan catches one-handed while holding on to a point with his other hand!
Well played sir, well played.
Fire needed that.
Ben Green has heaved Sunil Narine for just the second six of the innings, though a fan dressed as a prisoner is guilty of spilling a routine catch in the crowd before tumbling over his chair and landing in a crumpled heap on the floor.
Time for a bit of leg spin as Nathan Sowter comes into the attack for the first time, going for five singles from his first set.
Invincibles are in control of this match at the moment.
Willey c Billings b Chappell 13 (Fire 70-5)
Another falls! Zak Chappell bangs one in short and lures David Willey into a pull shot, but he can only glove the ball through to wicketkeeper Sam Billings.
Fire are in a bit of trouble here.