Ireland boss Giovanni Trapattoni faces an anxious wait as three of his players prepare to undergo scans on Monday.
Glenn Whelan damaged a hamstring 20 minutes into Stoke's 0-0
Barclays Premier League draw with
Liverpool and will be assessed when he meets up with the squad in Dublin.
He joins Leicester defender
Sean St Ledger and
Sunderland winger James McClean on the injured list with striker
Kevin Doyle having already been ruled out with a thigh problem.
St Ledger will also have a scan on his hamstring in
Ireland, while McClean's groin will be examined on Wearside after he complained of tightness following the 3-0 defeat at
Manchester United winger Robbie Brady, who was initially placed on the stand-by list, has already been drafted into the squad along with Sunderland's
Ireland face Group C favourites Germany at the
Aviva Stadium on Friday evening and then head for Torshavn for the clash with the Faroes next Tuesday.
They launched their qualification campaign with an unconvincing 2-1 win in
Kazakhstan last month, but will be looking for a significant improvement this time around.