A "round robin" is a term commonly used in sports, politics, and businesses, which refers to a tournament or a procedure, in which every participant or team takes turns playing or participating. The antonym for "round robin" could be a single-elimination method, in which participants are eliminated after losing a match, and the winner moves on to the next round until one ultimate champion is crowned. Another antonym could be a direct-elimination method, which means that every participant plays only one competitor, and the loser is ultimately eliminated. Unlike round-robin, both single-elimination and direct-elimination methods prioritize competitiveness and efficiency over equal opportunities for every participant.