The Ralph Beckett-trained Cubanita collared Sajjhaa in the dying strides to claim the Betfred EBF Gillies Fillies' Stakes at Doncaster.
Dropping from Group One to Listed level, Godolphin's highly-rated Sajjhaa was sent off the 7-4 favourite and looked to have sealed it when Mickael Barzalona swept to the front approaching the two-furlong pole.
But her stride was shortening just as Cubanita's abundant stamina was kicking in entering the distance, and Jim Crowley's mount (8-1) was half a length to the good as they flashed past the line.
The lightly-raced maiden winner Reckoning ran on encouragingly to fill the places under champion jockey Richard Hughes.
Crowley said: "It's been stop-start with her this season so hopefully she'll stay in training next year, fingers crossed. I got a good trip round. They went a good gallop and everything went well in the end. I think she'll get a mile and a half. The last furlong was her best furlong."
Godolphin clinched the owners' championship with a double through Mar Mar and Muharrib, both trained by Saeed bin Suroor.
Mar Mar (7-2) showed a neat turn of foot two furlongs out to easily win the Betfred Cock O'The North EBF Maiden Stakes by four lengths under William Buick.
"She's a very honest filly, but she was a bit unsettled and keen last time, so we thought visors would help. She'll be a nice seven-furlong filly for next year," said Godolphin's representative Diana Cooper.
Muharrib (5-1) led over a furlong out under Barzalona to defy top weight in the Betfred 'The Home Of Goals Galore' Nursery.
Cooper said: "He's a very bonny horse who has thrived all season. He'll have a nice holiday now and he's one to look forward to. He's very honest and game and gives his all every time."
23 April 2014No Sandown run for Oscar
Un De Sceaux to skip Punchestown
Treve among stellar Ascot entries
Charline still in Guineas mix
Big guns remain in Guineas frame
Telescope tops Richards runners
Prince in Punchestown frame
Sparrow set for Punchestown spin
Balder to take novice test
No rush for Annie target
Connell eager for Tank chase run
Cosgrave appeal set for Monday
Hughes set for Sandown return
France adds flair to Guineas
Mullins drops Vautour Champion hint
Exciting Bunker given Dante date
Culloty keen on Gold run for Heeled
Hannon triple-handed in Guineas
Resurge revived for Epsom return
Sandown option for Battalion
Johnston pair clash in Derby Trial
Reckless Abandon returns to track
22 April 2014Rizeena delights in Guineas workout
Carberry targets swift return
Williamson escapes serious injury
Rizeena thrills Brittain on gallops
Door bags National glory
Twiston-Davies hits four-timer
Joe suffers shock defeat
Scudamore hits century mark
Ivan lands Fairyhouse prize
Thousand shows star quality
Cirrus set for Treve clash
Houblon heads Gold contenders
Guineas still on Berkshire radar
21 April 2014Door bags National glory
Wilson passes away
Ivan lands Fairyhouse prize
Stepper set for trip drop
Richards in Telescope sights
Ladies geared for Summer repeat
Hill out of Irish National
No Dundeel at Royal Ascot
Clowance up for the Cup
Garner hit with lengthy ban
Memories in Final flourish
Fitz powers home at Fairyhouse
Toner hits target for Elliott
Joe ready for Cork outing
Lennon looking to call tune
Ground holds key to Tonto show
Lucky escape for Cook
Mind called up for National service
20 April 2014Fitz powers home at Fairyhouse
Lyons backs Brackan
Brookhouse turns to Crawford
Weld and Smullen keep up good work
Whiskey shows winning spirit
Brook another for Russell team
Zurigha blossoms in Snowdrop
Planning pounces at Haydock
Escalating moving on up
Buntline bidding for more
Rebel all set for big Powers test