The 2004 Supertaça Cândido de Oliveira was the 26th edition of the Supertaça Cândido de Oliveira, the annual Portuguese football season-opening match contested by the winners of the previous season's top league and cup competitions (or cup runner-up in case the league- and cup-winning club is the same).
Porto collected a second consecutive Supertaça, raising the club's tally to a record 14 trophies in the competition (53.8% of wins).
[12] The last meeting between these two sides in the domestic cup competition saw Benfica defeat Porto 2–1 in the final of the Taça de Portugal thanks to an extra time goal from Simão.
[13] Porto qualified for their second consecutive Supertaça Cândido de Oliveira by winning the 2003–04 Primeira Liga.
[14] Along the season, Porto remained in top spot and managed important victories against its rivals to clinch the Primeira Liga title.
Some notable wins during the season saw Porto defeat rivals Sporting CP, 4–1 on matchweek 3, as well as Benfica on matchday 5, 2–0.
Benfica defeated Estrela da Amadora 3–1, Académica de Coimbra 1–0, Nacional 2–1 and Belenenses 3–1 en route to the final.
[23] Initially, the Portuguese Football Federation announced that the Estádio Dr. Magalhães Pessoa in Leiria would play host to the Supertaça.
Between 2001 and 2003, the stadium underwent renovation as it was selected by the Portuguese Football Federation to be one of the host venues for UEFA Euro 2004.
Benfica went into the 2004 Supertaça Cândido de Oliveira with some key players missing due to injury as well as some being a doubt for the game.
Benfica's Takis Fyssas was a doubt for the match due to sustaining an injury in pre-season training.
Trapattoni left out goalkeeper José Moreira who had arrived a few days prior to the Supertaça due to representing Portugal at the 2004 Summer Olympics.
Trapattoni would include seven newly acquired players in his squad; Eurípedes Amoreirinha, Azar Karadas, Everson, Manuel dos Santos, Paulo Almeida, Quim and Yannick Quesnel.
Fernández's squad selection for the Supertaça saw him include seven newly acquired players: Adriano Rossato, Diego, Giourkas Seitaridis, Hélder Postiga, Hugo Leal, Miguel Areias and Ricardo Quaresma.
On 21 minutes, Porto's influential midfield talisman Diego sustained an injury which required him to be replaced by César Peixoto.
Benfica, for the remainder of the half, would apply pressure on Porto's defense but was unable to get a breakthrough and score the opening goal of the game.