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
1988–89 S.L. Benfica season Their next match was a Clássico with second-place Porto, ending in a draw. Until Christmas, Benfica increased their lead to four points. However, they lost for the first time in the next match, with Boavista, followed by a second consecutive loss with Penafiel, which did cause them to lose their first place because Porto also lost. In the following weeks, Benfica racked up wins and increased their lead to six points by March. The Clássico on the 29th match-day helped define the course of the remainder of the season. It was Porto's last hope of closing the gap, but Benfica