Harlequins celebrate at the final whistle, Harlequins v Stade Francais, Amlin Challenge Cup Final, Cardiff City Stadium, Cardiff, Wales, May 20, 2011 © Getty Images
Established in 1996, the tournament sees 20 teams compete in five pools on a round robin basis with the pool winners progressing to the quarter-finals. They are joined there by the three pool runners-up who did not qualify for the last eight of the Heineken Cup. The winners then go on to contest the semi-finals and the final with the latter staged on a neutral ground.
The competition has been dominated by English and French sides with Clermont Auvergne, Sale Sharks and Harlequins all having won the title on two occasions.