FC Porto Nuno Valente and Derlei, Porto won the 2002–03 Primeira Liga with relative comfort, finishing 11 points ahead of second-placed Benfica. The club also won the UEFA Cup, defeating Celtic in a dramatic extra-time final, to win its second major European title. Mourinho then secured an unprecedented treble for Porto by winning the Taça de Portugal final against his previous club. The 2003–04 season began with another 1–0 win over União de Leiria, which gave the club its 13th Supertaça. Weeks later, Porto failed to repeat this result in the 2003 UEFA Super Cup, losing 1–0 to Milan. The departure of
1992–93 S.L. Benfica season in a replay match in Lisbon, which Benfica won 2–0 with goals from Isaías and Sergei Yuran. Over the following months, Benfica had their best period of the season. Nonetheless, March was a difficult month as the team marginally defeated Sporting CP at home after dropping points in the title race against Farense, and were knocked out of the UEFA Cup by Roberto Baggio's and Gianluca Vialli's Juventus. In early April, Benfica closed the gap to leaders Porto to one point, after a hard-fought away win against Boavista. Ahead of the "Clássico" on 17 April, Porto and Benfica were tied