The Polish striker claimed injuries stop Pep Guardiola's men from hitting their very best level, and singled out the Catalan giants as the team to beat once again
"I don't know if we are the big favourites. When all our players are fit I guess you could say so. Right now, we obviously are a bit less," he explained to Goal.
"Barcelona are in the best form of any of the teams at the moment, so they are top favourites. But maybe that is a little premature. I can’t say if they will keep their form on this level until the end of the season.
"In the end it doesn't matter who is the favourite, you have to fight in every game to win."
Goals from Thomas Muller and Arjen Robben had put Bayern in a commanding position during the first leg in Turin, but Juve fought back to grab a 2-2 draw which keeps their hopes alive for the return.
And the striker is expecting a similar game on Wednesday in the Allianz Arena.
"I guess Juventus will play the same as they did in Turin. They play very defensively, they are patient and they will be waiting for their chance in Munich," he said.
"It would be great if we could score an early goal. Then a second. Juventus would have to open up a bit and then maybe score the next one. That’s the way I imagine (laughs).
"But it won't be that easy against Juventus. It was important we scored twice in Turin. We showed there in the first half that we can cause them real problems when we are focused, especially in defence."
- Goal