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:
2–2 on aggregate. Levski Sofia won on away goals. ---- 1–1 on aggregate. Groclin won on away goals. ---- Dnipro Dnipropetrovsk won 3–1 on aggregate. ---- 1–1 on aggregate. Debrecen won on away goals. ---- Villarreal won 2–1 on aggregate. ---- Teplice won 2–1 on aggregate. ---- Parma won 9–0 on aggregate. ---- 3–3 on aggregate. Brøndby won 3–1 on penalty shootout. ---- Gaziantepspor won 6–1 on aggregate. ---- Rosenborg won 1–0 on aggregate. ---- Spartak Moscow won 5–3 on aggregate. ---- Perugia won 3–1 on aggregate. ---- Benfica won 5–1 on aggregate. ---- 0–0 on aggregate. Vålerenga won 4–3 on penalty shootout. ---- Sochaux won 6–2 on aggregate. ---- Auxerre won 4–0 on aggregate. ---- Newcastle United won 4–2 on aggregate. ---- Roma won 2–1 on aggregate. ---- Bordeaux won 2–1 on aggregate. ---- Liverpool won 2–1 on aggregate. ---- Mallorca won 3–2 on aggregate. ---- Barcelona won 5–0 on aggregate. ---- Gençlerbirliği won 4–1 on aggregate. ---- Valencia won 4–0 on aggregate.
Gençlerbirliği won 4–0 on aggregate. ---- Marseille won 1–0 on aggregate. ---- Roma won 2–1 on aggregate. ---- Celtic won 3–1 on aggregate. ---- Bordeaux won 6–2 on aggregate. ---- Club Brugge won 1–0 on aggregate. ---- Valencia won 5–2 on aggregate. ---- Liverpool won 6–2 on aggregate. ---- PSV Eindhoven won 3–1 on aggregate. ---- Auxerre won 1–0 on aggregate. ---- 2–2 on aggregate. Benfica won on away goals. ---- 2–2 on aggregate. Internazionale won on away goals. ---- Newcastle United won 4-2 on aggregate. ---- Mallorca won 3–1 on aggregate. ---- Barcelona won 3–1 on aggregate. ---- Villarreal won 5–2 on aggregate.
Fourth round
First leg
---- ---- ---- ---- ---- ---- ----
Second leg
Bordeaux won 4–1 on aggregate. ---- PSV Eindhoven won 4–1 on aggregate. ---- Villarreal won 3–2 on aggregate. ---- Celtic won 1–0 on aggregate. ---- Newcastle United won 7–1 on aggregate. ---- Internazionale won 4–3 on aggregate. ---- Marseille won 3–2 on aggregate. ---- Valencia won 2–1 on aggregate.
Quarter-finals
The first legs were played on 8 April, and the second legs were played on 14 April 2004.
First leg
---- ---- ----
Second leg
Villarreal won 3–1 on aggregate. ---- Marseille won 2–0 on aggregate. ---- Newcastle United won 3–2 on aggregate. ---- Valencia won 4–2 on aggregate.
Semi-finals
The first legs were played on 22 April, and the second legs were played on 6 May 2004.
First leg
----
Second leg
Marseille won 2–0 on aggregate. ---- Valencia won 1–0 on aggregate.
