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
2006–07 S.L. Benfica season against Porto on 1 April. The visitors scored first through Pepe in the 41st minute, but Benfica equalized in the 83rd minute with an own-goal from Lucho González. Santos attributed the draw to Porto goalkeeper Helton's performance, saying, "Helton made three or four great saves. We were better in the second half and we deserved to win." On the following Thursday, Benfica visited the Olímpic de Montjuïc to face Espanyol. The Spaniards pushed hard from early on and scored first through Raúl Tamudo in the 15th minute; shortly after the half-hour mark, Albert Riera made it 2–0 and in the