The Heineken Champions Cup is an annual rugby union tournament featuring the top clubs from Europe. It is organized by the European Professional Club Rugby and showcases elite teams from countries like England, France, Ireland, Wales, Scotland, and Italy. The competition typically runs from October to May, culminating in a final match to determine the champion. Teams compete in a pool stage followed by knockout rounds, with the best performing clubs advancing to the quarter-finals. The tournament is known for its high level of competition and attracts significant attention from rugby fans worldwide, making it one of the premier events in club rugby.