The U.S. Open Cup is an annual knockout soccer tournament in the United States, established in 1914. It features teams from various levels of American soccer, including Major League Soccer (MLS), United Soccer League (USL), and amateur clubs. The tournament is open to all eligible teams, making it one of the oldest and most inclusive soccer competitions in the country. Teams compete in single-elimination matches, with the winner advancing to the next round. The tournament culminates in a final match, where the champion earns a trophy and a spot in the CONCACAF Champions League, providing an opportunity for international competition.