The Champions League final is the biggest annual event in football, but there are those in European football who believe it should feel even bigger. “I can’t understand how the Super Bowl can feel bigger than the Champions League final,” one senior figure in European football said in an interview with The Athletic in April. “The Super Bowl, and the US generally, have this mindset, creativity and entertainment,” he added. “That’s what I have suggested, to have an opening ceremony to the Champions League, to have one match on the opening night where the winners take on a big team…