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
1977–78 S.L. Benfica season domestically, after the draw in Bessa, Benfica won all remaining league matches in 1977, finishing the year in first with 21 points, four more than Sporting and Porto, who still had a game in hand. They resumed their league campaign with the reception to Porto in the Clássico on 15 January. They drew 0–0 and kept Porto at bay, retaining a two-point lead over them. Benfica won the next three matches, one of them a Derby against Sporting with a goal from Vítor Baptista, who subsequently lost an earring, an episode he was best remembered. On 19 February, in a