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
FC Porto Under Ferreira's steering, Porto always qualified for the Champions League knockout stage, reaching the quarter-finals in 2008–09, where it was eliminated by holders Manchester United. The arrival of Mourinho's former assistant André Villas-Boas, in the spring of 2010, set the stage to a highly successful 2010–11 season, which began with a 2–0 victory over Benfica for the Supertaça. Spearheaded by João Moutinho, Silvestre Varela, Falcao and Hulk (the "Bola de Prata" winner), Porto performed strongly in the Primeira Liga and assured its 25th title with five matches to play, after beating Benfica in its stadium. In addition, the club broke