The full Republic of Ireland squad took part in training at the FAI National Training Centre on Thursday morning.
Striker Shane Long joined the other 25 players in the session after previously sitting out training due to ankle knock and had no reaction to the injury.
The squad will train again on Friday morning ahead of the UEFA Nations League double-header against Denmark (October 13) and Wales (October 16) at Aviva Stadium.
Over 46,000 tickets have already gone for the Denmark game on Saturday evening, so supporters are encouraged to buy the remaining tickets in advance to avoid disappointment.
It has also been another record-breaking year for Season Tickets, but there are still some available via www.faiseasontickets.ie
Republic of Ireland Squad
Goalkeepers: Darren Randolph (Middlesbrough), Colin Doyle (Hearts), Sean McDermott (Kristiansund BK)
Defenders: Cyrus Christie (Fulham), Matt Doherty (Wolverhampton Wanderers), Shane Duffy (Brighton & Hove Albion), Richard Keogh (Derby County), Ciaran Clark (Newcastle United), Kevin Long (Burnley), John Egan, Enda Stevens (Sheffield United), Darragh Lenihan, Derrick Williams (Blackburn Rovers)
Midfielders: Jeff Hendrick (Burnley), Conor Hourihane (Aston Villa), Alan Browne (Preston North End), Shaun Williams (Millwall), David Meyler (Reading), Harry Arter (Cardiff City*), Callum O'Dowda (Bristol City), James McClean (Stoke City)
Forwards: Shane Long (Southampton), Callum Robinson, Sean Maguire (Preston North End), Aiden O'Brien (Millwall), Scott Hogan (Aston Villa)
*Indicates player is on loan