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
1974–75 S.L. Benfica season Ciudad de Sevilla and the Independence Cup in Brazil. Benfica started their league campaign with victories against Belenenses and Farense, reaching top of the table, ex aequo with Porto. On match-day 3, they dropped their first points, in a home draw with Olhanense. They reacted by winning their following two league matches, while also easily progressing in the Cup Winners' Cup. On 13 October, Benfica visited Estádio do Bessa to play Boavista and drew 0–0. That resulted in them being caught in first place by Vitória de Guimarães and Porto. A week later, Benfica lost at home with Porto by