Bayern Munich are already the underdog against Real Madrid in the matchup. They must be in their best condition for this tough challenge. 
I'm curious about another thing by the way. Let's say Tuchel managed to win the Champions League title unexpectedly. Then do you think the board would change their mind about parting their ways with him? 
If you think that Real Madrid will easily win Bayern Munic, then I will disagree with you because the Champions league is the only trophy the German Big boys is hoping to lift this season. Having lost the German Bundesliga to Bayern Leverkusen and also out of the German cup which is like also going to Bayern Leverkusen, Bayern Munic will fight tooth and nail to win the champions league, all though I am not saying they will win. Even Real Madrid knows the task ahead and will be preparing accordingly. I'm curious about another thing by the way. Let's say Tuchel managed to win the Champions League title unexpectedly. Then do you think the board would change their mind about parting their ways with him?