He broke his maiden in a $2 million race and another lucrative target beckons for Prime Star if he can measure up against the better three-year-olds this spring.

The Richard and Michael Freedman-trained gelding holds a nomination for the Group One Golden Rose and will face a serious test of those credentials at Rosehill.

An early scratching from a benchmark race on Saturday's program, Prime Star will take his place in the Listed The Rosebud (1100m).

The horse relished a heavy track to win the rich Inglis Millennium at Warwick Farm in February and with showers forecast in Sydney, similar conditions are anticipated at Rosehill.

"The track he won on at Warwick Farm was very heavy so that's the part of it that would be pretty comfortable," Michael Freedman said.

"He had to have a bit of surgery after his win in the Millennium and have a knee cleaned up.

"But he had a nice long spell after that and a nice long grounding to get ready to run first up.

"He's had two trials and I've been very happy with both of them."

The early scratching of Rule Of Law leaves a field of 10 to contest the first stakes race of the Sydney season with Pago Pago Stakes runner-up Kumasi an early favourite.