Rajeem landed a stunning a 50/1 victory in the Falmouth Stakes at Newmarket.
The three-year-old filly, trained by Clive Brittain and ridden by Kerrin McEvoy, defeated Nannina by three-quarters of a length in the Group One contest over a mile, sponsored by the UAE Equestrian And Racing Federation.
Musicanna was another three-quarters of a length back in third while Soviet Song, winner of this race for the last two years, finished well down the field.
A steady early pace was set by Nasheej with Rajeem close up while Nannina and Soviet Song were towards the rear.
The race developed into a sprint with Rajeem quickening well and she was always too strong for Nannina, who had comfortably beaten her in the Coronation Stakes at Royal Ascot.
Jamie Spencer brought Soviet Song on the outside but she was never able to get in a blow as McEvoy, successful on Smart Enough (9/2) in the opening race, completed a 279/1 double.