S.L. Benfica 2015, Benfica reported to have 246,401 members; however, after a scheduled renumbering by the club in August 2015, the number decreased to 156,916. In April 2017, Benfica reported they had a total of 184,264 members by 31 December 2016. Benfica has rivalries with Sporting CP and FC Porto, with whom it forms the "Big Three": Portugal's most decorated clubs. None of them have been relegated from the Portuguese league since its establishment in 1934. As Lisbon-based clubs, Benfica and Sporting have shared a rivalry for over a century; it all started in 1907 when eight prominent Benfica players defected to
1985–86 S.L. Benfica season a trio composed of Carlos Manuel, Diamantino Miranda and José Luís from leaving. In the league, Benfica started in erratic shape but quickly settled and racked up several consecutive wins. They ended 1985 in first place and having the Supertaça Cândido de Oliveira, their second Supertaça. In the first months of new year, Benfica kept their first place, while knocking out Porto and Sporting from the Portuguese Cup. In April, the season took a dramatic turn when Benfica lost at home to Sporting and were matched in first place by Porto, who confirmed their title a week later. Nonetheless, Benfica