Sydney midfielder Harry Cunningham will miss up to six weeks of footy with a foot injury he picked up in Saturday's big win over St Kilda.

Cunningham, who had kicked two goals from 12 possessions before he was forced from the ground late in the third quarter against the Saints, has partially torn the Lisfranc ligament in his right foot.

Coach John Longmire said the 23-year-old will be in a moon boot in the short term, but won't need an operation to fix the problem, with the injury just another part of footy that is out of his control.

"It's really unfortunate for him. He's been in very good form and really important for us, so it's a bit of a setback," he said.

"Fortunately he's avoided surgery, which is a good thing because that would mean the season.

"We got a couple of players back (last week) and it's a bit like swings and roundabouts at times, but you've got to be able to deal with that.

"We've been pleased with the players that have come into the team and we've got players in good form in the reserves as well."

Longmire said former co-captain Jarrad McVeigh (hamstring) wasn't likely to make it back for this Friday's clash with Hawthorn at the SCG, but Sam Naismith (knee) and Kieren Jack (hip) were in contention.

Naismith, who missed the win over St Kilda, ran laps at training on Monday morning and will need to step up the intensity of his running and change of direction work throughout the week to be considered for selection.

Jack hasn't played since round five, but completed a light skills session with the NEAFL group and will also attempt to press his case at Wednesday's main session.

"It's really just a medical call (with Jack); it's more about whether he's right to play and if he's done enough work on his hip," Longmire said.

"The good thing is he's done the training session, but it's obviously a massive step up to play against the Hawks at the SCG on a Friday night."

After starting this season 0-6, three straight wins have plenty of experts tipping the Swans as finals contenders again, but Longmire's mindset hasn't changed heading into his side's last game before their mid-season bye.

"I've always just looked at what's immediately in front of us. You take care of that and you don't have to worry too much about what's on the horizon," he said.

"It's just not relevant for us at the moment."