A red card in football is a serious punishment that immediately ejects a player from the match. Issued for dangerous fouls, violent conduct, or repeated misconduct, it changes the dynamics of a game. Teams must continue with 10 players, often costing them the match. Red cards are shown by referees and have been central to some of the sport’s biggest controversies. Want to know the rules and impact of red cards? Read everything about a red card in football.