Florian Wirtz scored twice as electric Bayer Leverkusen triumphed 4-0 at Feyenoord on Thursday as the last day of the first week of the revamped Champions League got under way. The German champions, who lost only once last season in the Europa League final to Atalanta, netted early on through Germany’s Wirtz. Spain’s Alejandro Grimaldo made it 2-0 on the half hour and playmaker Wirtz soon scored a near carbon copy goal, with Dutchman Jeremie Frimpong again assisting. An own goal from Feyenoord’s German goalkeeper Timon Wellenreuther had Leverkusen four up on 45 minutes. In the other early game…