FIFA sets strict rules for player replacements in 2026 World Cup

Only in cases of extreme necessity—serious injury or illness—will FIFA permit a player swap between a national team's final World Cup squad and its preliminary list, and that substitution must occur at least 24 hours before the team's opening match. The governing body released the regulations and exceptions for squad adjustments ahead of the 2026 tournament, which kicks off next month across the United States, Canada, and Mexico, underscoring that tight restrictions will govern any changes to the finalized rosters before the competition begins.

Goalkeeper exception and competitive balance

A special provision applies to goalkeepers: any keeper on the final 26-player list may be replaced by another from the preliminary squad at any point during the tournament if a serious injury or health condition prevents them from playing. FIFA stated the rules aim to strike a balance between competitive fairness and offering teams limited flexibility to handle emergencies, without opening the door to alterations that could undermine the integrity of the competition.