Tahiyra stunned favourite Meditate as she powered to victory in the Moyglare Stud Stakes at the Curragh.
Aidan O'Brien's Meditate arrived unbeaten in four starts and looked set to add to her tally in the hands of Ryan Moore as everything appeared to be going to plan entering the closing stages of the seven-furlong Group One prize.
Moore went for home two furlongs out, with Chris Hayes content to let him go on aboard the Dermot Weld-trained Galway maiden winner Tahiyra (100-30) before engaging top gear with a furlong to run.
Meditate had a couple of lengths advantage, but the winner produced an electric turn of foot, reeling in the leader in a matter of strides and sprinting two and a quarter lengths clear, with a further four and a half lengths back to third-placed Eternal Silence.
Tahiyra is a Siyouni half-sister to Weld's former stable star Tarnawa and Betfair offer 3-1 about her for next year's 1000 Guineas.