West Coast defender Tom Barrass looks increasingly unlikely to take to the field against Sydney tomorrow night in a potentially huge blow to the Eagles’ hopes of stopping Lance Franklin.

Barrass was unsighted at the club’s training session at the SCG today following a session walking laps on Monday.

The 22-year-old has played every game this season and was not named on the club’s injury list earlier this week.

The doubt over Barrass has thrust Oscar Allen into the picture as a potential standby option, with the 2017 draftee in Sydney with the extended Eagles squad.

West Coast will name their team this afternoon.

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Eagles assistant coach Sam Mitchell didn’t give anything away when addressing reporters’ questions about Barrass’ availability ahead of training.

"I'm not sure. You'll have to do the count yourself," Mitchell said.

Camera Icon Oscar Allen (bottom) is in Sydney with the West Coast squad. Credit: Trevor Collens

"We've got match committee after training, so there's still a couple of decisions to be made.

"I've got very strict instructions not to tell you who is playing."

191cm Allen, 19, has made five appearances for WAFL club East Perth after being taken with pick 21 in last year’s national draft.

Franklin kicked eight goals to set up Sydney’s win over West Coast in round one, overcoming both Barrass and Jeremy McGovern in a scintillating performance.

West Coast coach Adam Simpson confirmed earlier in the week that forward Jarrod Brander would become the club’s seventh AFL debutant this season, helping fill the void left by Jack Darling against the Swans.

More to come