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
2008–09 S.L. Benfica season against Porto and Sporting. They began the month with the semi-final of the 2008–09 Taça da Liga against Vitória de Guimarães. Benfica scored the opening goal on a Carlos Martins corner kick which Grégory headed into his own net. Near the end of regulation time, Pablo Aimar added the second (his first for the club), and Guimarães responded with a consolation goal. Four days later, Benfica played Porto at the Estádio do Dragão in a game between the top two teams on the league table. They scored first through Hassan Yebda, who headed in a corner kick from José Antonio