These are common in those sports and games where each match must involve a small number of competitors : often precisely two , as in most team sports , racket sports and combat sports , many card games and board games , and many forms of competitive debating .

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 .
