Sydney Swans co-captain Kieren Jack is confident his side is in the right frame of mind for Friday night's preliminary final against Geelong.

Given their injury queries and coming off a six-day break against a rested Geelong side who have won eight straight, minor premiers the Swans will start as underdogs.

"We don't care what position we're in on the medical side or form side or what the betting is sort of saying, we've got a chance to play in a grand final," Jack said.

The Swans overwhelmed Geelong at Simonds Stadium in round 16, walking away with a 38-point win after what was probably their finest performance of the season.

Geelong suffered their biggest loss of the season and were held to 60 points, by far their lowest tally of the year.

"Our attitude and our desire to put pressure on the ball was top notch, probably some of the best we've done for the year, so it's pretty simple. It is what we have to bring (on Friday)," Jack said.

"I think the way we played, our mindset going into that game, our attitude on the field, that's what we need to capture again."

The Swans have an excellent 5-1 record in matches coming off a six-day turnaround this season and their only loss in those circumstances was a last-gap defeat at home to Hawthorn.

"It's all about recovery and rehab. We think we've got that process down pat," Jack said.

"We train solidly today and go in with some confidence that we've done it during the year a few times on six-day breaks.

"We just need to make sure our mindset and our attitude is spot on heading into Saturday night."

Gary Rohan and Kurt Tippett have run with the main Sydney Swans group at the start of training on Wednesday morning in the side's last major hit-out before Friday's preliminary final against Geelong.

Rohan's rate of recovery was significant given he was stretchered off the ground last Saturday and was sighted on crutches after the game.

"Initially we all probably feared the worse when you see him off on the medicab," midfielder and Swans co-captain Kieren Jack said.

"He's obviously had some dark times with that leg in previous years, so to get the scan and come back positive is great. So he's up and about now and he's a chance."