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
1996–97 S.L. Benfica season while the results in Europe were looking accordingly. In late October, Benfica visited Sporting for the Derby de Lisboa, losing one-nil and dropping down one position. A week later, with a further two more points dropped, Porto opened a three-point gap at the front. By the time the Clássico arrived, the distance was already five points. Losing 1–2 to Porto, increased it to eight. Affected by the defeat, Benfica lost for a second time on a row, with the priority changing from battling Porto in the title race, to defending the second place from Sporting. Autuori was sacked immediately, and