Tournament
A competition with many matches, each with a small group of competitors. The tournament winner is based on the combined results of these individual matches. These are common in sports and games where each match can only have a small number of competitors, often  two, as in most team sports, racket sports, combat sports, many card games and board games, and competitive debating. Such tournaments allow large numbers to compete against each other, even though there are only two teams or players in a single match.