Platinum Jack can keep alive his chances of a Queensland Derby start with a competitive showing against older horses at Warwick Farm on Wednesday.The last-start Wyong maiden winner will step out in the Fairfield RSL Memorial Club Handicap but has come in for solid support in his first try over the Derby distance of 2400m.Hawkesbury trainer Scott Singleton admits Platinum Jack, backed from $7.50 to $6.50 with TAB Sportsbet, needs to continue to improve to make next month's Queensland Derby field

Platinum Jack can keep alive his chances of a Queensland Derby start with a competitive showing against older horses at Warwick Farm on Wednesday.

The last-start Wyong maiden winner will step out in the Fairfield RSL Memorial Club Handicap but has come in for solid support in his first try over the Derby distance of 2400m.

Hawkesbury trainer Scott Singleton admits Platinum Jack, backed from $7.50 to $6.50 with TAB Sportsbet, needs to continue to improve to make next month's Queensland Derby field but nominated the gelding because he was showing enough potential as a stayer.

"I think we nominated him (for the Derby) because we know he will run the trip," Singleton said.

"Whether he's that class remains to be seen. He's got a long way to go but if he wins tomorrow or is competitive it still gives him a chance of maybe getting there."

The son of Platinum Scissors broke through for a maiden win in his seventh start with a 2-1/2-length success over 2100m on April 26.

Singleton was impressed by the performance and is not concerned about the outside barrier (11) because Platinum Jack is a natural backmarker who came from last to win at Wyong.

"His last start win was pretty soft in the end and it didn't really knock him about," Singleton said.

"He's always been looking for that sort of journey. He's a natural stayer that just switches off and I don't think the 2400 metres will be any problem."

Among Platinum Jack's rivals on Wednesday is the Gai Waterhouse-trained Two For Tea who has the steadier of 63.5kg.

Two For Tea placed in the Group Three Colin Stephen Quality at Randwick last September and in his most recent start was third in the Queanbeyan Cup.

Singleton said it was always a query taking on the older horses but didn't want to run Platinum Jack over less ground against his own age.

"It's hard to know how he'll go until you take them on. He only won a maiden last start but I don't think he could have been more impressive," Singleton said.

The Kris Lees-trained Jardaa and the Guy Walter-prepared Our Banshee opened at $4.80 with TAB Sportsbet on Tuesday ahead of Two For Tea and Tunes at $5.