A single-elimination tournament is a type of competition where participants are eliminated after losing a match. Each match is a knockout round, meaning that the winner advances to the next round while the loser is out of the tournament. This format continues until only one participant remains, who is declared the champion. These tournaments are commonly used in various sports and games, such as basketball, tennis, and video gaming. They are popular because they create a straightforward path to determine a winner, making it easy for fans to follow the progress of their favorite competitors.