A RIB fracture will keep Vic Metro defender and likely future Magpie Isaac Quaynor out of Sunday's clash with Vic Country in the NAB AFL Under-18 Championships.

Quaynor was a standout for Metro in its last-gasp win over the Allies last week, having played on despite receiving a heavy knock in the game.

He finished with 20 disposals but will miss this week's clash at the MCG after the injury.

>>WATCH Vic Metro v Vic Country live on the AFL Official App on Sunday from 12pm AEST

Quaynor is a member of Collingwood's Next Generation Academy and has come into contention as a top-15 pick at this year's national draft.

Carlton father-son prospect Ben Silvagni will also miss the game with injury, but potential Brisbane father-son James Rendell has been included at centre-half forward.

Metro will also regain possible first-round pick Riley Collier-Dawkins. The midfielder missed last week's clash with concussion.

In-form midfielder Sam Walsh will lead Vic Country in the clash, with ruckman Bailey Williams, ball-winner Bailey Smith and forward Curtis Taylor among the other possible first-round picks playing in the game.

Vic Metro heads into the contest unbeaten after two games, while Vic Country has not yet notched a win.