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
1978–79 S.L. Benfica season Máritimo and was now two points behind Porto, but still with one game less. After winning the game in hand, Benfica matched Porto again at the front, but let them slip again after dropping points in the following game. A visit to Varzim, where they drew 1–1. Benfica responded with several consecutive wins, including one in Estádio de Alvalade, with a goal from João Alves. As Benfica entered June, they were still neck and neck with Porto, but with a disadvantage in the head-to-head. In second-to-last match-day, Benfica dropped points in Aveiro in a 0–0 draw with Beira-Mar and practically