The European Rugby Champions Cup is an annual rugby union tournament organised by European Professional Club Rugby (EPCR). It is the top-tier competition for clubs who compete in a predominantly European league. Clubs qualify for the Champions Cup via their final positions in their respective national/regional leagues or via winning the second-tier Challenge Cup; those that do not qualify are instead eligible to compete in the second-tier Challenge Cup.

Rugby union football, commonly known simply as rugby union or more often just rugby, is a close-contact team sport that originated at Rugby School in England in the first half of the 19th century. Rugby is simply based on running with the ball in hand. In its most common form, a game is played between two teams of 15 players each, using an oval-shaped ball on a rectangular field called a pitch. The field has H-shaped goalposts at both ends.