Sunday’s Arc Trials at ParisLongchamp provided clues for the Oct. 6 Prix de l’Arc de Triomphe (G1).

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.