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
2003–04 S.L. Benfica season first of a cycle of three decisive matches. Three days later, Benfica played the quarter-finals of the Portuguese Cup against Nacional. After conceding on 22nd minute, the team spent over an hour trying to score. Tiago then scored in the 85th minute, with Sokota scoring Benfica's second a minute later. This put the team into the semi-final. On 15 February, Benfica received Porto for the second Clássico of the season. Porto scored first through Costinha, but Benfica levelled the match through Simão on the 50th minute, with the game ending in a 1–1 draw. Camacho expressed that the correct result