Answer : 1. "Rugby"
Explanation :

1. The European Champions Cup or Heineken Cup is related to rugby sport. This competition is organized between European rugby union clubs. It is one of the most prestigious rugby competitions in the world.

2. The European Champions Cup was established in 1955. The initial name of this competition was the European Club Champions Cup. In 1995, the competition was renamed the European Champions Cup. In 2005, the name of the competition's sponsor was changed to Heineken Cup.