SYDNEY captain Josh Kennedy heads a long list of players in doubt for Friday night's crucial clash with Geelong at Simonds Stadium.

Kennedy struggled with a hamstring problem during the Swans' six-point loss to Hawthorn last week, managing just 14 possessions in his 200th game at the MCG.

The skipper failed to train at the SCG on Monday, instead doing some stationary ball work, with injured teammates Jake Lloyd (hip), Sam Reid (groin), Gary Rohan (back), Callum Sinclair (ankle) and Sam Naismith (knee) also on light duties.

Lloyd, who was a late withdrawal from Friday night's match, and Reid, who has missed the past two games with groin soreness, both managed to run strongly after an extended warm up, and did short kicking drills in what was a good sign for both players.

Longmire was hopeful all six could train at Wednesday's main session but the news on Kennedy's hamstring was positive.

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"He's pulled up better than expected but we're not sure if he'll play this week or not," he said.

"He had a scan and it's a little bit inflamed, but there's no black or white answers in these situations.

"The coaches, the medical staff and the player all have a massive say in these decisions, and they happen every week.

"That’s why we don't have match committee early in the week these days because there's just no point, you don't have the information in front of you."

Naismith looks the most in danger of missing the trip to Geelong, meaning Reid (if fit) and Kurt Tippett will be competing for a spot in Longmire's best 22.

If Tippett gets the nod it will be his first senior game since round 10, which coincidentally was the last time the Swans dropped a game before Friday night's defeat, also to the Hawks.

The 30-year-old is fresh after Sydney's reserves had a bye in the NEAFL last week, but kicked five goals from 10 marks and 21 disposals in his previous match.

"He's a chance, our reserves didn't play on the weekend but had a really good hit out on Friday," Longmire said.

"He's feeling a lot better now and is moving quite well, but a bit depends on Sam Reid's availability as well.

"It's about how the whole team looks, but also how Naismith and our other talls pull up."