After racing in mid-division she made steady progress in the last quarter mile, took the lead in the closing stages and won by a neck from the colt Mambo Nights.
She was restrained by Watson at the rear of the seven-runner field before moving up to take the lead approaching the final furlong and drawing away from her opponents to win in "impressive" style by eight lengths.
Quadrilateral maintained her run, overtook Powerful Breeze in the final strides and won by a head with a length and a half back to Love in third place.
With Watson in the saddle she was in contention from the start and kept on well in the closing stages but never looked likely to win and came home third, beaten two and a half quarter lengths and a head by Love and Cloak of Spirits.
[9] Thirteen days later, the filly started favourite for Coronation Stakes at Royal Ascot and finished third behind Alpine Star and Sharing, beaten six lengths by the winner.