Lionel Messi will captain Argentina at the World Cup, national coach Lionel Scaloni said on Thursday as he unveiled his 26-man squad.Messi, 38, had not previously confirmed he would play in what will be a record-breaking sixth tournament for the Argentine superstar.But it had been widely assumed the eight-time Ballon d’Or winner would again lead Argentina, four years after lifting the trophy in Qatar.As well as confirming Messi’s presence, Thursday’s announcement notably excluded Real Madrid’s Franco Mastantuono from the Argentina squad.Eighteen-year-old Mastantuono is considered one of the brightest prospects in Argentine football.Tottenham captain Cristian Romero has been named in the squad despite being injured. Photo: ReutersThe largest ever World Cup, co-hosted by the United States, Canada and Mexico, kicks off June 11.