Barcelona missed so many chances in the first game, that game ended 0:0. And now Barca is at home, I think they should score 2-3 goals and advance to the next round.
Barcelona has a good perfomance acting at home and will receive a team that is less qualified as to the technician.
Bayern Munich has earned 12 Points from their last 4 Home Games, Scoring 14 Goals and Conceding 2 Goals. Mainz has earned 3 Points from their last 4 Away Games, Scoring 4 Goals and Conceding 10 Goals. Bayern Munich to Win.
Win today and they go level on points at the top with Dortmund. After being knocked out of the UCL, you would expect them to now focus on the league