Australia heads O'Brien four

Australia could joined by three other Ballydoyle residents in the Investec Derby at Epsom on Saturday week.

Aidan O'Brien confirmed at the 'Breakfast with the Stars' morning at the Surrey venue that the red-hot ante-post favourite may be accompanied by Geoffrey Chaucer, Kingfisher and Orchestra.

Joseph O'Brien, the trainer's son, is set to partner Australia, a most encouraging third in the 2000 Guineas at Newmarket on May 3.

Ryan Moore won the Irish 1,000 Guineas last weekend aboard the O'Brien-trained Marvellous and is poised to get the leg-up aboard Geoffrey Chaucer.

O'Brien said: "At the moment, it's looking possible we'll run four - Australia, Geoffrey Chaucer, Kingfisher and Orchestra."

Jamie Spencer is relishing the prospect of riding Arod in the premier Classic. The Peter Chapple-Hyam-trained colt made up lots of late ground at York on just his third career start to finish second in the Dante.

Spencer issued a slight advisory, however, in that Arod needs a sound surface to be fully effective.

The jockey said: "It looks like Arod is going to run in the Derby.

"He's a high-class horse and is lightly raced.

"He needs fast ground, so watch this space."