Ireland play their UEFA EURO 2020 European Qualifier against Switzerland on September 5, followed by a Three International Friendly against Bulgaria five days later.

There are first call-ups for Stoke City's Nathan Collins, Doncaster Rovers midfielder Kieran Sadlier and Tottenham striker Troy Parrott.

Crystal Palace midfielder James McCarthy returns to the squad for the first time under McCarthy and may make his first appearance since October 2016.

Speaking to FAI TV ahead of the announcement, McCarthy said the size of his provisional squad was due to the amount of club games in the coming weeks.

"I dont know what's going to happen between now and the next couple of games. We've got Saturday games, Tuesday games, Saturday and then the Saturday before me meet up. Players could get injured before we meet up."

With focus on the European Qualifier against Switzerland, McCarthy expects a tough game against the UEFA Nations League semi-finalists.

"Switzerland are a good side. They have been in the higher echelons of the top teams in Europe for the last number of years."

To buy tickets for the Switzerland and Bulgaria matches, please visit fai.ie/tickets

Republic of Ireland squad to play Switzerland and Bulgaria

Goalkeepers: Darren Randolph (Middlesbrough), Keiren Westwood (Sheffield Wednesday), Mark Travers (AFC Bournemouth), Kieran O'Hara (Burton Albion, on loan from Manchester United)

Defenders: Seamus Coleman (Everton), Matt Doherty (Wolverhampton Wanderers), Shane Duffy (Brighton and Hove Albion), Richard Keogh (Derby County), John Egan (Sheffield United), Kevin Long (Burnley), Nathan Collins (Stoke City), Enda Stevens (Sheffield United), Greg Cunningham (Blackburn Rovers, on loan from Cardiff City), Cyrus Christie (Fulham), Darragh Lenihan (Blackburn Rovers), Derrick Williams (Blackburn Rovers). Ciaran Clark (Newcastle United)

Midfielders: Conor Hourihane (Aston Villa), Glenn Whelan (Heart of Midlothian), Josh Cullen (Charlton Athletic, on loan from West Ham United), Jeff Hendrick (Burnley), Robbie Brady (Burnley), Alan Browne (Preston North End), James McClean (Stoke City), Callum O'Dowda (Bristol City), James McCarthy (Crystal Palace), Jack Byrne (Shamrock Rovers), Alan Judge (Ipswich Town), Harry Arter (Fulham, on loan from AFC Bournemouth), Ronan Curtis (Portsmouth), Kieran Sadlier (Doncaster Rovers)

Forwards: Callum Robinson (Sheffield United), Scott Hogan (Stoke City, on loan from Aston Villa), Shane Long (Southampton), Michael Obafemi (Southampton), David McGoldrick (Sheffield United), James Collins (Luton Town), Aiden O'Brien (Millwall), Troy Parrott (Tottenham Hotspur), Sean Maguire (Preston North End)