A tournament is a competitive event where individuals or teams participate in a series of matches or games to determine a winner. These events can take place in various sports, such as soccer, tennis, or basketball, and often follow a structured format, including elimination rounds or round-robin play. Tournaments can vary in size and scope, ranging from local competitions to international championships. They may also have different rules and formats, such as single-elimination or double-elimination, depending on the sport and the organizing body, like FIFA for soccer or USTA for tennis.