Opposition analysis is tricky when the team you’re studying is yet to play an AFL game, but Sydney midfielder Dan Hannebery feels the Swans aren’t in the dark about Greater Western Sydney’s untried youngsters.

The Giants will blood a record 17 debutants in Saturday night’s stand-alone season start.

Most of the AFL community don’t know much about them, but the Swans won’t be struck with the same sense of the unknown.

“Most guys have spent their time looking at the players they might line up on,” Hannebery told AAP.

“It’s really important we have our analysis of them, how they play and what their strengths and weaknesses are.

“We’re pretty comfortable we’ve done our homework and it’s just about us worrying about our structures now and going about our business.”

With limited footage of GWS’s pre-season games available, the process has been a little atypical, but not as much as you’d imagine according to Hannebery.

“It’s no different to any other opposition analysis really,” he said.

“It wasn’t just Horse (coach John Longmire), the coaches and the players research all the players.

“We haven’t really seen any of them play an AFL game yet, so no one knows what their real strengths or weaknesses in the AFL are.

“But you can go off the strengths and weaknesses at under-18 level and what sort of players they are.”

Gary Rohan (ankle) was in doubt for the game but he completed the Swans’ final training session on Thursday without trouble.

“Gazza was flying around. Initially, everyone feared the worst the way he came down,” Hannebery said.

“But then the way he trained yesterday – he was up and about, flying around.

“I think everyone had to tell him to calm down a bit, but he’s 100 per cent.

“He’s moving really well and pulled up really well today. So he’ll be ready to hopefully terrorise the backline.”

Many are predicting a long season for GWS, citing how more-experienced Gold Coast struggled to three wins in their maiden campaign.

But Hannebery believes predictions and comparisons aren’t worth much at this point.

“It’s great to have a chat about it, but we’ll know after we play them tomorrow night how they might go this year,” he said.

“There’s no point comparing. It’s out of everyone’s control to compare. I find it quite pointless.

“Obviously, they’ve got a lot of young, talented kids. There’s no doubt tomorrow night we need to bring our A game.”