Complacent, one of the favourites for the Australian Derby, is out for the autumn because of injury.
Darley's head trainer, Peter Snowden, told Racing NSW stewards on Tuesday that the group 1-winning three-year-old had sustained an injury to the near foreleg.
Complacent rose to prominence last spring, going from a Hawkesbury maiden win in September to winning the group 3 Gloaming Stakes and group 1 Spring Champion Stakes at his next two starts.
The colt by Authorized rounded out his spring campaign with a second to Polanski in the Victoria Derby after striking interference 2000 metres from home.
With Complacent now out of the race, Polanski is the $3.50 favourite for the Australian Derby, ahead of Savvy Nature at $6, with the TAB.