Gold Coast coach John Cartwright has kept Parramatta guessing over his final line-up for Friday night's NRL semi-final in Sydney despite naming a side on Tuesday.

William Zillman - back from a four-match ban for biting - has been named on an extended bench with Preston Campbell at fullback and injury concern Mat Rogers (concussion) at pivot.

However, Cartwright has refused to rule out slotting Zillman into fullback, Campbell into pivot and Rogers into the centres for the must-win game.

"We will train with all options then wake up Friday morning then make up our minds," Cartwright said on the Gold Coast on Tuesday.

Zillman slots into the squad at the expense of utility Josh Graham, who has been ruled out for the rest of the season with a fractured foot.

"Josh needs a pin in place. He only got on for the last five minutes but it has ended his season - there goes another utility," Cartwright said.

"But we've got Zilly back and only need three forwards on the bench most times.

"But how we balance the bench we will have to wait and see."

Young forward Will Matthews has again been included as 18th man.

The Titans boast a strong record against Parramatta, having won all three competition matches contested between the two clubs since 2007.

Team: Preston Campbell, Kevin Gordon, Chris Walker, Jordan Atkins, David Mead, Mat Rogers, Scott Prince (c), Luke Bailey (c), Nathan Friend, Matt White, Anthony Laffranchi, Mark Minichiello, Ashley Harrison. Interchange: Michael Henderson, Brad Meyers, Sam Tagataese, William Zillman, Will Matthews (one to be omitted).

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