Lauren Winfield-Hill scored her first half-century in The Hundred this year to lead Oval Invincibles to an eight-wicket win over London Spirit.
Set 121 to win, Invincibles got over the line with nine balls to spare thanks to an unbeaten 61 in 40 balls from captain Winfield-Hill.
The Invincibles opener hit the winning runs with her 10th boundary, taking her partnership with Marizanne Kapp, who made 30 from 18 balls, to 51 in the process.
Victory takes Invincibles level on points with leaders Welsh Fire and keeps them in with a chance of qualifying directly for next Sunday’s final at Lord’s.
But for Deepti Sharma’s 46 not out, to rescue Spirit from 47-7 to post 120-8, the margin of victory would likely have been big enough to send Invicibles top on net run-rate.
As it is, Winfield-Hill’s side go into their final group match – against Trent Rockets on Wednesday – knowing a win guarantees them a place in the top three.
They must wait on Fire’s result at Southern Brave earlier that day to know what will be required to take top spot, though.
Meanwhile, Spirit are two points back in fourth and need to win at Northern Superchargers on Tuesday to book a top-three place.
Invincibles’ win also means Manchester Originals have now been eliminated from contention.