These threats are timed to occur during major matches in the competition. In the Champions League, the quarterfinals are crucial phases where teams compete for a chance to play for one of the most coveted trophies in football, as well as a position in the semi-finals. Any interruption or security lapse during these games could have serious repercussions for the participating teams as well as the tournament's and the sport's overall reputation.
“Terrifying ISIS Champions League threat prompts Spanish police to activate ′all alert systems′ in massive security operation ahead of Real Madrid′s quarter-final fixture against Man City - Goal.com”
“Terrifying ISIS Champions League threat prompts Spanish police to activate ′all alert systems′ in massive security operation ahead of Real Madrid′s quarter-final fixture against Man City - Goal.com”