Bayer Leverkusen host AC Milan in the Champions League on Tuesday, hoping for a sparkling performance from star midfielder Florian Wirtz. Still just 21, Wirtz will make his home debut in the competition, having missed Leverkusen's most recent Champions League campaign with an ACL injury. That he will do so against seven-time champions Milan feels appropriate for a player tipped for a long career on the European stage. Leverkusen's squad is deep in quality and Xabi Alonso's coaching is rightly praised, but Wirtz's spark is central to everything the team does.