The Aga Khan's four-time Group 1 winner Tahiyra (Ire) (Siyouni {Fr}) has been retired following her third-placed finish in the Queen Elizabeth II S. at Ascot on Saturday. Trained by Dermot Weld, she was unbeaten at two, jumping straight from her maiden success to victory in the Moyglare Stud S. This season, she was beaten half a length by Mawj (Ire) (Exceed And Excel {Aus}) in the 1,000 Guineas at Newmarket before gaining her own Classic win in the Irish 1,000 Guineas and adding the Coronation S. and Matron S....