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
1979–80 S.L. Benfica season 13 April, Benfica visited Estádio de Alvalade to play Sporting, losing 3–1, with the gap to the leader Porto now at six points. Wilson complained of a "skilful" referee. Out of race, Benfica closed April with a draw against Boavista, increasing to seven the difference to the leader. May started with an away win against Varzim, for the semi-finals of the Portuguese Cup. They would meet Porto in the final for the fifth time in history. On 1 June, Benfica ended the Primeira Divisão campaign with 45 points, in third place. Not since 1954 had Benfica gone so long without