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 with Vitória de Setúbal on 20 January, losing a point in the race. Two weeks later, in the visit to Estádio das Antas to face Porto, Benfica lost 2–1 and opened a four-point deficit, which Wilson admitted: "is a disadvantage difficult to overcome". But February had also scheduled a Portuguese Cup match against Sporting for the round of 16, which Benfica won by 2–1. Back on the league, despite dropping points with Vitória de Guimarães in early March, Benfica kept the chase to the front two, but could not cut the distance to them, which remained at four points. On