1999–2000 S.L. Benfica season "their worst performance of the season, and seeing Porto close in on the top of the table." On 4 November, Benfica hosted P.A.O.K. for the second leg of their European qualifier. They lost 2–1 in normal time, requiring extra time and a penalty shootout to decide the match. The Lisbon side converted all their shots, progressing into the next round. Four days later, the club defeated S.C. Braga by one goal in a league match to open a three-point lead. After a one-week break for the Taça de Portugal, Benfica visited Estádio das Antas for the Clássico against Porto. They
1983–84 S.L. Benfica season Alvalade being eliminated by Sporting. In February, Benfica lost points again in the league after twelve consecutive wins. March was even more troublesome because the team was knocked-out of the European Cup by Liverpool, while in the league, Porto gave them their first league loss all season. Still, in the following month, Benfica won five games and draw one, allowing them to keep the three point lead over Porto. On 29 April, Benfica unexpectedly lost 4–1 with Vitória de Guimarães. The loss did not cause major damage because Porto had also lost points, so the distance was only cut to