S.L. Benfica Sporting. Followed in Europe, Africa and the Americas, any match between both teams is known as "dérbi de Lisboa" ("Lisbon derby"), "dérbi eterno" ("eternal derby"), "dérbi da Segunda Circular", "dérbi dos dérbis" ("derby of the derbies") – the most important football derby in Portugal. The rivalry between Benfica and FC Porto, which started with a friendly match on 28 April 1912, comes about as Lisbon and Porto are the largest Portuguese cities, respectively. Benfica and Porto are currently the two most decorated clubs in Portuguese football, with the former historically being the most decorated team overall. Any match between the
1986–87 S.L. Benfica season campaign started with a Clássico with Porto, which ended with a draw. A win in match-day 2 was followed by another draw. Six consecutive wins propelled Benfica into first place isolated, with two points in hand. In the end of November, Benfica contested the Supertaça with Porto and was defeated by 4–2 at home, after a one-all draw in Antas. On the second week of December, in the Derby de Lisboa with Sporting, Benfica conceded their largest loss ever in the Primeira Divisão, losing 7–1. Fans reacted with anger towards Mortimore and ripped flags and scarfs with the club image.