Fred Kersley dropped a bombshell yesterday when he revealed that Marasco was no certainty to run in the Cox Plate. Marasco could be switched to the Australian Mile Challenge.

The Challenge offers a $1 million bonus to the connections of the horse who can win the $1 million Emirates Stakes (1600m) at Flemington on November 10, $1 million Carlton Draught Railway Stakes (1600m) at Ascot on November 24 and $700,000 Futurity Stakes (1600m) at Caulfield on March 1.