What happens to a player who receives a second yellow card during a match?

When a player receives a second yellow card during a match, they are shown a red card and must leave the field immediately. This action results in the player being sent off, meaning they cannot continue participating in that match and, importantly, they cannot be substituted for another player. This rule is crucial in maintaining the integrity and flow of the game, as it discourages repeated fouling while ensuring that teams play with the appropriate number of players following disciplinary actions. The player who has been sent off will also face further consequences, including a potential suspension for future matches, depending on the competition's rules. The structure of the yellow and red card system is fundamental to how the game is officiated, reinforcing fair play.