Caulfield Cup placegetter Vigor, at risk of missing a Melbourne Cup berth, is now going to run in the $250,000 Lexus Stakes at Flemington on Saturday.

Trainer, Danny O'Brien has decided to roll the dice and take the horse's destiny out of the hands of others.

A win in the Lexus will guarantee Vigor an exemption from the ballot.

Master O'Reilly, the 2007 Caulfield Cup winner, will run in the $750,000 Mackinnon Stakes at Flemington on Saturday, after his eye catching effort in this year's Caulfield Cup.

Caulfield Cup winner Viewed, chasing back-to-back Melbourne Cup victories, will cap his build-up by running in the Mackinnon Stakes.

Romana Emperor, runner-up to Viewed at Caulfield, will go straight into the Cup without another run.