Aidan O'Brien lands seventh European Classic of 2026 with unbeaten Diamond Necklace

Trainer Aidan O'Brien claimed his seventh European Classic of 2026 as Diamond Necklace won the Prix de Diane, remaining unbeaten with five wins from five starts. Jockey Ryan Moore was aboard for the victory, which gave him a complete set of major European Classic wins. The win continued O'Brien's remarkable dominance of the European Classic season.