This competition was contested between the first round losers from the 2002–03 European Challenge Cup.

[2] The structure of the competition was a purely knockout format; teams played each other on a home and away basis, with the aggregate points winner proceeding to the next round.

The competition began on 6 December 2002 and culminated in the final at the Madejski Stadium in Reading on 25 May 2003.

Castres Olympique secured a victory over Caerphilly in the final and picked up their first piece of European Club silverware.

Castres Olympique Grenoble Mont de Marsan Pau Gran Parma L'Aquila Overmach Parma Petrarca Padova Rugby Roma Rovigo Rugby Silea Dinamo București La Moraleja UC Madrid Caerphilly Ebbw Vale All kickoff times are local to the match location.