Ace Impact and Hukum are among 15 horses to stand their ground for the the Prix de l’Arc de Triomphe at ParisLongchamp on Sunday following the first forfeit stage.

French Derby hero Ace Impact is the clear favourite to provide trainer Jean-Claude Rouget with his second victory in Europe’s premier middle-distance contest, following the success of Sottsass three years ago, but looks set to face a strong challenge from across the Channel.