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
FC Porto for the first time. The 2006–07 Primeira Liga title was only secured in a frantic final day, as Porto finished one point above Sporting and two above Benfica. In the following season, the club achieved the "Tri" for the second time in its history – with López clinching the top goalscorer award –, but lost the Taça and Supertaça finals to Sporting CP. As result of a legal investigation on match fixing in Portuguese football, Porto was punished with the loss of six points, which did not affect its final league classification. Having claimed a sixth league and cup double