Key defender David Astbury and wingman Brandon Ellis have both been ruled out of Friday night's MCG clash against top-of-the-ladder Geelong.

Speaking to the media this morning, senior coach Damien Hardwick confirmed the two had pulled up sore from last weekend's match against North Melbourne.

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He said they were both likely to miss just one week, with Astbury suffering a minor hamstring injury and Ellis a minor groin injury.

"This time of year, the fatigue factor starts to set in and bodies start to break down a bit," Hardwick said.

"We're hoping at this stage it's just the one week."

After training "incredibly well" this week, Hardwick said Daniel Rioli, who played VFL last weekend, would be considered for selection.

"What we were probably after was his workrate to get back to what we knew, and he's started to work his way back into that," Hardwick said.

"We know (high pressure) is what his best game looks like. Every now and then, players, whilst they perform, they don't quite perform to the level of expectation we have of them or they have of themselves.

"So, Daniel went back and rediscovered that part of his game. And we know when he's at his very best it certainly helps our football side win a lot of games.

"We're glad he recaptured that last week so he'll certainly come into consideration for selection tonight."

Richmond's final team for Round 12 against the Cats will be announced at richmondfc.com.au at 6.20pm tonight.