The 24 squads were officially announced by FIFA on 21 May 2015. Each participating national association had to submit a final list of 21 players (three of whom must be goalkeepers) at least 10 days before the tournament started. These players were shortlisted from a provisional list of 35 players, including a minimum of four goalkeepers. All players must have been born on or after 1 January 1995. If a player listed in the final squad suffered a serious injury up until 24 hours before the kick-off of his team's first match, he could be replaced by a player from the provisional list with the approval of FIFA's medical and organising committees.