Roger Charlton’s 9-4 favourite Quadrilateral maintained a 100% start to her career by winning the Group One Fillies’ Mile at Newmarket.
Sired by champion horse Frankel, the two-year-old, ridden by Jason Watson, beat 7-1 Powerful Breeze by a head for her third win in three races this year.
Aidan O’Brien’s 4-1 shot Love, ridden by Ryan Moore, finished a length and a half further back in third place.
Quadrilateral is the favourite for next year’s 1,000 Guineas at Newmarket.
Powerful Breeze had won both of her first two races, most recently the May Hill Stakes at Doncaster in September.
On good to soft ground, she was ahead into the final furlong but was reeled in by Charlton’s filly, as jockey Watson celebrated a first domestic Group One victory after overseas top-level wins in Germany on Aspetar and in Italy with God Given.
Quadrilateral’s quality clear in thrilling finish – analysis
BBC horse racing correspondent Cornelius Lysaght
The race looked a good quality staging beforehand. That feeling was enhanced by a thrilling finish, with Quadrilateral the latest potential star to be produced by the Juddmonte Farms thoroughbred breeding operation.
That said, judging by the way she was keeping on for the encouragement of her rider, races further than the Guineas distance of a mile might be even more up the winner’s street.
Look out for the horses in second, third and fourth, which all look like good prospects too. And a quick word regarding Jason Watson – the 2018 champion apprentice is already looking a natural in this bigger league.