There are more conventional paths towards the Blue Diamond Stakes but trainer Mike Moroney is willing to try the unorthodox again to deliver a second win in Melbourne's richest two-year-old race.

Moroney will test the Blue Diamond credentials of last-start winner Serenade when the filly runs as one of the favourites in the $250,000 Inglis Classic at Rosehill on Saturday.

Because its eligibility is restricted, the Inglis race is an unlikely lead-up to the Blue Diamond.

But Moroney has stable history on his side thanks to his 2001 Diamond winner True Jewels.

"We ran True Jewels in this race (the Inglis Classic) and then brought her back for the Blue Diamond," Moroney said.

True Jewels started favourite in the Inglis Classic before finishing second to Fair Embrace but she was at the top of her game a month later, beating a Blue Diamond field that included Lonhro, a horse which turned out to be one of the modern-day greats of the Australian turf.

A $61 chance for the Blue Diamond on February 28, Serenade made spectacular improvement in blinkers when she led throughout to win at Canterbury on Australia Day.

Serenade backs up relatively quickly for a young horse and she has a new rider as Glyn Schofield takes over from Brenton Avdulla who is serving a suspension.

"She went to the line without being pushed along too hard, so hopefully she's got a bit of improvement in her," Moroney said.

Serenade has drawn the rails and she is one of four last-start winners to accept in the 11-horse field.

Aside from Serenade, the most prominent of the quartet will be the Rod Northam-trained Odyssey Moon.

Bred for precociousness as a son of Snitzel, Odyssey Moon hasn't raced since his debut win in December when he claimed the Inglis Nursery, another race exclusively for Inglis yearling sale graduates.

While the Inglis Classic will offer the biggest purse on Saturday, it will be overshadowed in importance by the Breeders Classic.

The fillies and mares race carries Group Two status and has attracted 10 acceptors headed by the Chris Waller-trained stablemates Catkins and Arinosa.

Eight three-year-olds will line up in the Eskimo Prince Stakes with Scissor Kick, runner-up in the Group One Golden Rose during the Sydney spring carnival, set to resume from a favourable barrier draw.