"He's just a fat black slug," she said after Blacks A Fake finished his work on Brian Hancock's Calderwood track this week.

"He is so cunning. He only does what he thinks he can get away with and I'm never happy with his work."

Blacks A Fake saves his best for the race day and would never be sacked.

He has three Inter Dominion trophies, a Victoria Cup, a Hunter Cup and a Treuer Memorial in his trophy cabinet.

More recently he has dominated the Grand Circuit with commanding wins in the Queensland Pacing Championship and Trans Tasman last month and is here for next week's Miracle Mile.

It would be the final jewel in his crown and Rasmussen has decided the Cordina Quicken Chicken Sprint (1760m) at Harold Park tonight is an ideal lead-up.

"He hasn't had a run for three weeks and he needs the run to be ready for next week," Rasmussen said.

"If you could run him every week without breaking him down you would because he so slack at trackwork.

"It will be like a trial for him and hopefully he can come through and win it."

Bookmakers think Blacks A Fake will have little trouble with tonight's field, quoting the champion a $1.18 chance to make it 10 wins on end. The eight-year-old is in the midst of the best winning run of his career, which has included four Group One victories, including a third Inter Dominion.

Rasmussen wants to add the Miracle Mile to Blacks A Fake's long list of Group One wins, but admits it isn't a priority.

"I'd love to win a Miracle Mile, but everything is aimed at the Inter Dominion next year," she said.

"To win a fourth one of those in our own state would be the greatest."