Cambridge colt It's A Dundeel (Dundeel) has returned to Sydney to begin his Australian Derby campaign and will run against Pierro in a barrier trial at Warwick Farm on Friday.
The Murray Baker-trained colt won four races in New South Wales last spring including the group one Spring Champion Stakes.
He went to Melbourne unbeaten but had his colours lowered By Super Cool in The Vase at Moonee Valley before finishing seventh as favourite in the Victoria Derby won by Fiveandahalfstar from Super Cool.
Pierro also went to Melbourne in the spring with a perfect record but found All Too Hard all too good in the Caulfield Guineas and again finished behind Black Caviar's half brother when the pair ran the placings in Ocean Park's Cox Plate.
Trainer Gai Waterhouse has abandoned a Victorian trip for Pierro which was was to have included the Newmarket Hcp and Australian Guineas to campaign in Sydney instead, after discussions with owner Greg Kolivos.