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
2006–07 S.L. Benfica season against Porto on 1 April. The visitors scored first through Pepe in the 41st minute, but Benfica equalized in the 83rd minute with an own-goal from Lucho González. Santos attributed the draw to Porto goalkeeper Helton's performance, saying, "Helton made three or four great saves. We were better in the second half and we deserved to win." On the following Thursday, Benfica visited the Olímpic de Montjuïc to face Espanyol. The Spaniards pushed hard from early on and scored first through Raúl Tamudo in the 15th minute; shortly after the half-hour mark, Albert Riera made it 2–0 and in the