The Portuguese National Championship, also known as the Campeonato Nacional de Futebol, is the top division of the Portuguese football league system. It is contested by 18 teams and is one of the most prestigious competitions in Portugal.

The competition was founded in 1934 and is the oldest football league in Portugal. The current champions are Sporting CP, who won their 24th title in 2019. The competition is divided into two stages, the regular season and the playoffs. During the regular season, each team plays each other twice, once at home and once away. At the end of the regular season, the top four teams qualify for the playoffs.

The playoffs are a single-elimination tournament, with the winner being crowned the Portuguese National Champion. The playoffs are usually held in May and June, and the final is usually held at the Estádio do Dragão in Porto.

The Portuguese National Championship is one of the most competitive leagues in Europe, and the teams that compete in it are some of the best in the world. The competition has produced some of the greatest players in the history of the game, including Cristiano Ronaldo, Luis Figo, and Eusébio.

The Portuguese National Championship is an exciting competition that is sure to provide plenty of thrills and spills. It is a great way to experience the passion and excitement of Portuguese football, and is a must-see for any football fan.