All teams must name one player as captain. The role of the team captain carries official responsibilities.
The captain must and all the time will participate in the coin toss at the start of the game to decide who kicks off and choose ends, and any coin toss prior to a penalty shootout.
Captains also communicate with the referee during a football match: If a team regularly break the Laws of the Game in any way or another, a referee will have a word with the team captain, asking him to sort out the behavior of his teammates.
The captain should be the strongest willed individual, most dominant player on his team. He is expected to encourage or chastise his teammates when necessary, perhaps even making minor tactical changes while play is on the line.
Team captains in football are either defenders or midfielders, because players in these positions can see what’s going on around them and control it directly. However, well-respected attackers and goalkeepers have been known to captain teams, for example, 40-year-old goalkeeper Dino Zoff captained Italy’s 1982 World Cup winning team. Captains are usually also among the more popular players with the crowd, allowing a bond to develop between the supporters and the his team.