FC Porto the 1955–56 Primeira Divisão on head-to-head advantage over runners-up Benfica. Later that season, Porto beat Torreense to win its first Taça de Portugal and achieve its first double. As the Portuguese league winner, Porto made its debut in European competitions by qualifying for the 1956–57 European Cup. The club's first participation was short-lived, ending in the preliminary round with two defeats against Spanish champions Athletic Bilbao. A year later, Porto lifted its second Taça de Portugal by beating Benfica 1–0 in the final. The two clubs met again in the following season's final, but this time Benfica took the trophy
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