Knockout rounds are a stage in competitive tournaments where participants compete in head-to-head matches. In this format, the loser of each match is eliminated from the tournament, while the winner advances to the next round. This continues until only one competitor remains, who is declared the champion. These rounds are commonly used in various sports and games, including soccer, basketball, and tennis. The knockout format adds excitement and intensity, as each match is crucial for a competitor's chance to win the overall title.