A knockout tournament is a type of competition where participants are eliminated after losing a match. Each round consists of pairs of competitors, and the winner advances to the next round while the loser is out of the tournament. This format continues until only one competitor remains, who is declared the champion. Knockout tournaments are commonly used in various sports, such as football, tennis, and basketball. They are popular because they create a sense of excitement and urgency, as each match can determine a competitor's fate. The straightforward structure makes it easy for fans to follow the progress of the tournament.