I think Bayern can be beaten but Bundesliga teams can't defend properly, Juve can definitely beat this current Bayern over two legs as Lewandowski would have a hard time against the Juventus defence, the midfield trio of Juventus come the knockouts will be as good as any in the competition, the wide areas will produce great service for the front two Dybala and Morata. Also game changers off the bench like Zaza and Mandzukic can get a important goal in a two legged tie.