1983–84 S.L. Benfica season left the club in second, a point shy of the leader Porto, their next opponent. In the Clássico, Benfica beat his rival Porto and assumed first place. Later in the month, Benfica defeated Olympiacos in the second round of the European Cup, qualifying for the quarter-final. In November and December, Benfica won all their league matches, but lost the Supertaça Cândido de Oliveira to Porto. Benfica kept on winning in the Primeira Divisão in January, lapping the first part of league with a three-point lead. However they suffered a set-back in the Taça de Portugal, losing 2–1 in Estádio de
1974–75 S.L. Benfica season 1–0 and dropped to third place, two points shy of leaders Porto and Guimarães. They reacted positively to the loss and won their next four Primeira Divisão matches, retaking first place albeit shared with Porto. Both had 18 points. In Europe, Benfica qualified for the quarter-finals, after eliminating Carl Zeiss Jena in the second round. Off the field, Benfica lost Eusébio to injury, as he underwent his six operation to his left knee. On match-day 12, Benfica drew 0–0 with Oriental and dropped to second, a point from leaders Porto. In the final three matches of December, Benfica won the