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."
28 March 2015Naadirr strikes to take Trophy
Sole switches on late power
Tullius has to pull out the stops
Romsdal up and running
Raven swoops for De Sousa
Panther pounces for Gold
Hanagan strikes first blow
Stack harbours Lincoln doubts
Odeliz gears up for Park
Mshawish given green light for Turf
Margarson keeps faith in Guest
Havlin has high hopes with Hopkins
Togo lands another for Pakidis
Longsdon and Fehily rule with Law
Coleman picks up ride on Druids
Power out to end Meydan hoodoo
Jack firmly in Trophy hunt
McCoy honoured with Celebration
O'Brien set on Flat resumption
'Rock star' Chrome seeks World fame
27 March 2015Romsdal returns at Kempton
Solow flying high for Head
All to play for at Doncaster
Flemenstar makes Navan return
Panther primed for big Gold run
Derby Fever for Godolphin
Toast recovering from setback
Motion out to keep winning Sequence
Home comforts at Newbury
Curtis keen on Townend for Tea
Flintham upholds family honour
Newmarket moves to avoid split
Weld sweet on 'middleweight' Zawraq
Eagle poised for Curragh return
Signal to swerve Wetherby gallop
Ballydoyle brigade excites Hensey
Angel leads the way in Lincoln
26 March 2015Sruthan gets Gladness go-ahead
Kelly to contest Wolves ban
Gatsby thrills in Meydan spin
Monaghan on the up
On-song Cappella has Classic aim
Godsmejudge on track for Aintree
Ground key to Found Guineas attempt
Thriving Berkshire Ganay-bound
Gleneagles set for Curragh spin
Ginge handed Topham option
Side sights set on World place
Tizzard 'really pleased' with Card
Limato pencilled in for Ascot
Spinal issue sidelines The New One
25 March 2015Fairyhouse Right for Job
Gold goal for Biographer
National aim for Alderwood
Cleary keen on Alba chance
Tank to bid for Gold compensation
Setback for Charming
Ascot hopes for Able
Moore hoping for Rome glory
Grey shines in Tapeta spin
Faugheen to get Aintree entry
McCoy - Door has very good chance
Bookmakers see Rocky road ahead
Rheu in line for Aintree
Baker bags Smullen and Spencer
No hurry for Dude rider
Motion expects Sheema test to suit
Panther pleasing in Gold prep
Chrome sparkles in Meydan spin