A number of Australian Guineas hopefuls will press their claims in the CS Hayes Stakes at Flemington but history suggests it is not easy to claim the double.

The Group Three CS Hayes Stakes for colts and geldings is one of the traditional lead-up races to the Group One Australian Guineas, but Dash For Cash in 2002 is the most recent galloper to win both races.

Mouawad (1997), Mahogany (1994) and Zabeel (1990) are others to have claimed the double.

Chris Waller has scratched Kermadec from the CS Hayes Stakes to keep him in Sydney for Saturday's Hobartville Stakes, but nine of the 13 remaining runners are $21 or under in Australian Guineas markets.

Lucky Liberty is on the second line of Guineas betting and is favourite to continue the unbeaten start to his career at his fourth start on Saturday.

The gelding steps to stakes company for the first time but trainer Henry Dwyer says the three-year-old is capable of continuing to step up.

Former WA gelding Disposition has his first start for the Wez Hunter stable and jockey Craig Williams is confident he is a genuine Guineas contender.

The Mike Moroney-trained Merion is another horse on a Guineas path and jockey Steven Arnold believes he will have taken benefit from his first-up third to Profit Share and Stratum Star when racing on speed and then tiring late over 1300m at Sandown.

"I thought his run was good," Arnold said.

"It's a good, solid race again with a lot of chances but I worked him on Tuesday and I'm really happy with the way he's going."

Merion is unbeaten in two starts at Flemington in the Listed Anzac Day Stakes as a two-year-old and the Listed Living Legends Stakes as a spring three-year-old over 1400m.