en 2003%E2%80%9304 LEN Trophy

The 2003–04 LEN Trophy was the 12th edition of LEN's second-tier competition for men's water polo clubs.

Knockout stage

Team 1	Agg.Tooltip Aggregate score	Team 2	1st leg	2nd leg
Ferencváros	17–16	Szeged	7–10	10–6
Jadran Split	14–7	Budvanska Rivijera	9–1	5–6
Niš	16–13	Ethnikos Piraeus	9–6	7–7
CN Marseille	17–13	CSKA Moscow	11–5	6–7
Chios	13–16	Vouliagmeni	7–7	6–9
Mataró	19–20	Chania	9–7	10–13
Barcelona	25–14	Dynamo Moscow	18–10	7–4
Strasbourg	9–13	Mornar	4–4	5–9

Team 1	Agg.Tooltip Aggregate score	Team 2	1st leg	2nd leg
Vouliagmeni	13–12	Ferencváros	8–5	5–7
CN Marseille	7–16	Barcelona	2–6	5–10
Jadran Split	20–12	Chania	12–9	8–3
Niš	16–13	Mornar	9–6	7–7

Team 1	Agg.Tooltip Aggregate score	Team 2	1st leg	2nd leg
Barcelona	16–11	Jadran Split	9–1	8–10
Vouliagmeni	15–13	Niš	10–6	5–7

Team 1	Agg.Tooltip Aggregate score	Team 2	1st leg	2nd leg
Vouliagmeni	16–21	Barcelona	11–11	5–10

2003–04 LEN Trophy Champions
Barcelona 2nd Cup