Joining Bayern Munich for the purpose of winning the champions league was something he could actually achieved but then he would have considered the caliber of teams in the champions league currently and the ones that's ere present when Bayern Munich win the trophy, it's very possible for Bayern Munich to still bring back history, since it's seeming like they are not having much chance at their domestic league, they could employ some new tactics and skill to help them win the champions league again since they have got the experience before, they can just decided to focus on the champions league the more and hope to see what they make out of it.
I mean there is still a lot that can happen and we don't know what the great coaches out there are planning, even though Tuchel had a bad time in the bundesliga match, but that doesn't guarantee that his performance in the UCL will be bad.
everyone knows how Tuchel experience throughout his journey as a coach in several of the teams he coached was able to give good performance to the teams he coached and this time we only see the bad side but in some time to come we will be given a good surprise from Bayern Munich.
I say this doesn't mean I'm a supporter of Bayern Munich but looking at Munich performance it is actually very strong but behind it all there is a big plan that we don't know about and another reason is that it is impossible for management to extend the contract with Tuchel if his performance is bad but in fact Tuchel is still being retained because management believes that Tuchel can help Bayern Munich achieve its glory days again.