in sport, a championship is a competition to determine which individual or team is the champion. different forms of competition can be called a championship. it is usually the final competition in a tournament (a series of competitions). for example, the fifa world cup is a tournament held every four years. the winner of the final competition of each tournament becomes that tournament's champion. in a league system, the championship is the final competition of a regular season. in some league systems, a series of playoffs is used to determine the champion of a season. there is one champion for each season. in combat sports, such as wrestling and boxing, a competitor must challenge the current champion to win the championship.