In the 89th minute, Leverkusen's defences were eventually overturned, with Alvarez again the hero of the hour as he picked up a sneaked pass into the box from team-mate Angel Correa.
Liverpool maintained their perfect Champions League record to guarantee a top-two finish in the league phase and automatic last-16 qualification with a 2-1 win over Lille at Anfield on Tuesday.
It's been a journey into the unknown, but the new-look 36-team Champions League is finally reaching the climax of the league ...