Republic of Ireland manager Mick McCarthy is waiting to hear the results of a scan on Aaron Connolly.
The Brighton striker injured his groin in Sunday's Premier League defeat to Manchester United.
Ireland play New Zealand in a friendly on Thursday night, before Denmark visit the Aviva on Monday for the make-or-break Euro 2020 qualifier.
McCarthy says the likes of Lee O'Connor, Troy Parrott and Jack Byrne could have the chance to impress on Thursday.