Domestic leagues are competitions held within a specific country, where professional sports teams compete against each other. These leagues are organized by national governing bodies and typically feature a regular season followed by playoffs or finals to determine the champion. Examples include the English Premier League in soccer and the NBA in basketball. Teams in domestic leagues often represent cities or regions, fostering local rivalries and fan engagement. The performance in these leagues can affect a team's eligibility for international competitions, such as the UEFA Champions League in soccer, where top teams from various domestic leagues compete on a global stage.