Primeira Liga is highest ranked football division in Portugal, created in 1934 year. Now, Primeira Liga is formed by 18 professional clubs. Each club plays 26 matches against every other member of Primeira Liga, one as host and one as guest. Clubs are ranked in table according points they won, goal difference and goals scored. At the end of the season top two teams from Primeira Liga are qualified for UEFA Champion League, 3rd and 4th clubs alog with winner of Cup of Portugal are qualified for UEFA Europa League. If the winner of Cup of Portugal is already registered for UEFA tournament last spot for UEFA Europa League is given to next club in end-season table. Most popular clubs in Primeira Liga are Benfica with 36 titles and Porto with 28 titles won. These two teams are well known from UEFA international football tournaments. Last two teams from end-season table are relegated to lower Segunda Liga and their spots are taken from the teams finished on top two places in Segunda Liga.