St Kilda midfielder David Armitage has been ruled out of the Saints' clash with West Coast on Saturday due to a groin injury.

The veteran midfielder felt sore following his side's loss to Melbourne last weekend, and will join Nick Riewoldt in watching Saturday's match from the sidelines.

โ€œUnfortunately Dave Armitage pulled up sore in the groin from that game and will miss this week,โ€ Saints GM of Football Performance Jamie Cox told saints.com.au on Tuesday night.

โ€œItโ€™s not one we think is too serious and he should only miss a week or two.โ€

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His absence may be filled by veteran half-back Leigh Montagna, who is a chance to return to the senior side after a calf strain kept him out of the entire JLT Community Series.

โ€œOn the positive side Leigh Montagna had some really good minutes in the VFL at the weekend and looks as though heโ€™ll be fit to be considered for selection,โ€ Cox said.