The Campeonato Paulista A1, also known as the São Paulo State Championship, is one of the oldest and most prestigious soccer leagues in Brazil. It was first established in 1902, making it one of the oldest soccer competitions in the country. The tournament features 16 teams from the state of São Paulo, including traditional powerhouses such as Corinthians, Palmeiras, and São Paulo FC. Corinthians is the most successful team in the history of the competition, having won the title 30 times. An interesting fact about the Campeonato Paulista A1 is that it has a unique format, with teams divided into four groups in the initial stage before progressing to knockout rounds.