The 2003–04 Heineken Cup was the ninth season for which European teams competed for the Heineken Cup. Competing teams, from

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...

Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Grea ...

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...

Scotland Scotland (, ) is a Countries of the United Kingdom, country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a Anglo-Scottish border, border with England to the southeast ...

and

Wales Wales ( cy, Cymru ) is a country that is part of the United Kingdom. It is bordered by England to the east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in ...

, were divided into six pools of four, in which teams played home and away matches against each other. The winners of the pools, together with the two best runners-up, qualified for the knock-out stage. This was the first competition in the series to employ the bonus point system for classifying teams. In prior competitions, teams earned two points for a win and one for a draw. Starting with the 2003–04 competition, teams earned points in the pool matches under the following scenarios: * Four points for a win * Two points for a draw * One bonus point for scoring four or more tries, regardless of the final score * One bonus point for losing by seven points or less

Teams

Pool stage

Pool 1

Pool 2

Pool 3

Pool 4

Pool 5

Pool 6

Seeding and runners-up

Knockout stage

Quarter-finals

Semi-finals

Final