The 2003–04 UEFA Cup was won by Valencia in the final against Marseille. It wrapped up a league and UEFA Cup double for Valencia. Porto could not defend their title as they automatically qualified for the 2003–04 UEFA Champions League and also went on to win the final for their second European Cup title.

Association ranking

For the 2003–04 UEFA Cup, the associations were allocated places according to their 2002 UEFA country coefficients, which took into account their performance in European competitions from 1997–98 to 2001–02.

Teams

The labels in the parentheses show how each team qualified for the place of its starting round:

Qualifying round

First round

Second round

Final phase

In the final phase, teams played against each other over two legs on a home-and-away basis, except for the one-match final.

Bracket

Third round

Fourth round

Quarter-finals

Semi-finals

Final

Top goalscorers