Brighton striker Aaron Connolly was taken off at half-time by manager Graham Potter in their 3-1 loss away to Manchester United - leading to concerns surrounding his fitness.
The Seagulls boss said after the game that the Galway man was "feeling his groin a little bit." Brighton were 2-0 down when the substitution was made.
Republic of Ireland manager Mick McCarthy has said, "Aaron will have a scan on Monday morning. Our medical team have been in contact with Brighton and when we have the results on Monday, we will know more."
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Connolly was included in Mick McCarthy's Republic of Ireland squad for the upcoming friendly against New Zealand, as well as the crucial Euro 2020 qualifier against Denmark at the Aviva Stadium on November 18th.
A win for the Boys in Green against the Danes will book a spot at next summer's finals, which will include games in Dublin. However, the last time the Republic of Ireland needed to win at home against Denmark to qualify for a major tournament - they lost 5-1 under Martin O'Neill.
Darren Randolph and Glenn Whelan who were both injury concerns are both expected to be fit when the squad meets up this week.
Randolph played 90 minutes for Middlesborough yesterday in a 2-2 against Queens Park Rangers after. Whelan meanwhile sat out Hearts' 5-2 win in the Scottish Premiership on the bench.
David McGoldrick has also shaken off a knock in the past couple of weeks and was one of the star players for Sheffield United yesterday as they drew 1-1 in north-London against Tottenham Hotspur. The striker also got a goal, which was later ruled offside by VAR.