WITH at least seven new faces set to line up for the Sydney Swans against Carlton on Saturday night, coach Paul Roos has warned fans to expect a few rough edges in their NAB Cup opener.

Draftees Trent Dennis-Lane, Lewis Jetta, Gary Rohan and Byron Sumner will join recruits Mark Seaby, Ben McGlynn and Josh Kennedy in the side to face the Blues at Blacktown Olympic Park.

Despite the prospect of some "messy" football, Roos was excited by the prospect of seeing his new-look side in action after the club's longest pre-season in seven years.

"It's the start of our preparation and the start of the guys getting used to playing together," he said before training at Lakeside Oval on Thursday.

"Our midfield [needs to] get used to the ruckmen, the younger players are getting used to the game style so it might be a little bit messy in patches but … hopefully we build over the course of the game and we play some good footy throughout stages of the game on Saturday night.

“We'll play some poor footy, no doubt, but hopefully we'll play enough good footy to give everyone a real view to this season and beyond."

With Jesse White (ankle) and Daniel Bradshaw (knee) unavailable, Daniel Currie and Mike Pyke will lend key-position support to Adam Goodes up forward.

Goodes and Craig Bolton will play despite missing last Friday's intra-club game, but Shane Mumford and Ryan O'Keefe will sit out with Roos reluctant to field any more players who skipped the practice match.

There are no such worries about the form and fitness of the quartet of draftees set to play - particularly Dennis-Lane, who booted five goals in that game.

Roos said he had been surprised by the ability of Dennis-Lane, Jetta, Rohan and Sumner to reach the required levels and didn't rule out a round one debut for any of them.

"If you get in early and you play well, you're always a chance for round one," he said.

"If you had have asked me after the draft, I wouldn't have said any of those kids would have played in round one, but having watched them train and now they're in the team in the NAB Cup, it's a real opportunity for all those four players.

"Trent and Lewis have probably got an advantage in that they've played against senior players in the WAFL last year … but four of them are in the team.

"If they play well, they keep playing during the NAB Cup and I'd be happy to have to make a decision where all four of them put their hand up for round one."