Italian Serie A is the top professional football league in Italy, featuring 20 teams that compete annually for the championship title. Established in 1898, it is one of the oldest and most prestigious leagues in the world, known for its tactical gameplay and passionate fan base. The league operates on a promotion and relegation system with Serie B, the second tier of Italian football. Each season, teams play 38 matches, facing each opponent twice, once at home and once away. The team with the most points at the end of the season is crowned the champion, while the bottom teams are relegated to Serie B.