Sean St Ledger and James McClean have emerged as injury concern for the Republic of Ireland ahead of the World Cup qualifier against Germany.
St Ledger sustained a suspected hamstring injury on Saturday, while playing for Leicester in the Championship and is rated as doubtful, but he will report to the squad for assessment.
James McClean reported a very tight groin after playing for Sunderland against Manchester City and will be scanned at his club on Monday.
A spokesman for the Football Association of Ireland said: "Sean St Ledger sustained a suspected hamstring injury. At the moment it looks unlikely that he will be able to play in the Germany match, but he will report for assessment.
"James McClean reported a very tight groin after his match and will be scanned at his club on Monday."
The news will come as a fresh blow to Trapattoni, who has already lost striker Kevin Doyle to a thigh problem.
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 David Meyler, and it remains to be seen if the Italian calls for further reinforcements.
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.
Trapattoni’s side launched their qualification campaign with an unconvincing 2-1 win in Kazakhstan last month and will be looking for a significant improvement this time around.