Republic of Ireland strike Shane Long is set to miss the friendly with Northern Ireland and Nations League game with Denmark due to an ankle injury.
Long is scheduled for surgery according to Southampton manager Mark Hughes and could be out for six weeks because of the problem.
He was not included in the squad for today's Premier League game with Watford.
Michael Obafemi, Scott Hogan, Sean Maguire, Callum Robinson, Aiden O'Brien and Ronan Curtis make up the striker options for now but it will be trimmed ahead of meeting up on Monday.
Ireland face Michael O’Neill side on Thursday at the Aviva Stadium before the trip to Aarhus four days later.