There may be plenty of questions nagging trainer Steve Asmussen about Curlin’s Breeders’ Cup Classic title defence at Santa Anita on Saturday, but for most of those outside his barn, the superstar has all the answers.

Connections of Big Brown are adamant his quest for the Triple Crown will not be unhinged by fatigue.

Holy Roman Emperor, second-favourite for the Stan James 2000 Guineas, is an eyecatching nomination for the American Triple Crown.

Barbaro stretched his unbeaten record to six with a brilliant performance in the 132nd Kentucky Derby at Churchill Downs.