1980–81 S.L. Benfica season with four more wins, including a home win against Porto, which widened their difference to four points. Meanwhile, in Europe, Benfica defeated Fortuna Düsseldorf in quarter-finals but was knocked-out by Carl Zeiss Jena in the semis. The final two months of the Primeira Divisão saw Benfica drop points with Académico de Viseu, Vitória de Guimarães and Sporting, reducing their lead to two points. On match-day 29, a home win against Setúbal secured their 24th league title. They concluded the season by winning their 17th Taça de Portugal in a 3–1 win against Porto. In the previous season, Mário Wilson failed
FC Porto a conflict between the technical staff and president Américo de Sá, which ended with the resignation of Pedroto and his replacement by Hermann Stessl. In December 1981, Porto overcame Benfica to win the inaugural staging of the Portuguese Super Cup, the Supertaça Cândido de Oliveira. Pedroto returned in April 1982 by the hand of the club's newly elected president Jorge Nuno Pinto da Costa, who had resigned as director of football, two years before, in solidarity with the coach. The previous month, Porto fell again in the Cup Winners' Cup quarter-finals against one of the eventual finalists, but needed only