Opera Singer stole the show on the undercard with a five-length conquest of the Prix Marcel Boussac. So devastating was the Aidan O’Brien pupil that the ever-reticent jockey Ryan Moore was already talking up her chances in the 2024 Arc.

On Saturday’s Irish Champions Festival kickoff, classic-winning sophomores Auguste Rodin and Tahiyra raced into the Breeders’ Cup picture by defeating older horses in a pair of “Win and You’re In” contests.

The feature event on Day 2 of Royal Ascot produced a surprising upset as 12-1 longshot Mostahdaf beat a bevy of top-level winners in the Prince of Wales’s (G1).