1977–78 S.L. Benfica season by Porto. The decisive Clássico in May, Porto secured a 1–1 draw after trailing most of the game, putting them on the course to win the league. Two weeks later, an unbeaten Benfica came second to Porto due to a 15 goal-average deficit. Benfica started the new season as three time Champion for the second time in the decade. In the transfer window, Benfica brought back Humberto Coelho and others like Celso Pita. Departing players included Nelinho, Artur Correia and Carlos Alhinho. One of biggest sagas of the transfer window was the return of Rui Jordão to Portugal, which Benfica
1990–91 S.L. Benfica season attentions were pointed on the league title. A strong campaign witnessed Benfica overtake Porto in February and then close the title with an away win in the Clássico, a controversial match because of the tactics employed by Porto to destabilize the team. On late May, Benfica secured their 29th league title, while Rui Águas won the Bola de Prata for league top-scorer. Benfica started the new season after having lost their fifth European Cup Final in the past season, while Porto regained the league title back. Swedish manager Sven-Göran Eriksson made some squad adjustments, releasing established players like Fernando Chalana,