Bayern is currently very weak and with their performance, Lazio has realistic chances against them. Of course, Bayern should not be underestimated and maybe they will cause a surprise, but in the next round at the latest they will definitely lose against a slightly stronger opponent and be eliminated from the CL. That's why I don't see Tuchel and co winning any title this year.
There is so much trouble going on in Bayern Munich, the whole team lacks confidence and sometimes tactics and strategy. Tuchel had a weird line up last Bundesliga game and he let the team play in a formation that they usually don't play like that. I wonder if he is still pissed and weakens the team on purpose as he couldn't give a reasonable explanation for his decisions.
If Lazio ever has a chance against Bayern Munich, then it is now. They won't face Bayern Munich ever again in such a bad condition. But it is still a game at home and I think that even a weak Bayern Munich team has a realistic chance to turn this around.
After years, we have this Bayern Munich at their lowest level with their confidence is also down and performance is also not as they were looking for even their attack is good, but things are not supportive with just few days left into their important game against Lazio, and they are having things to be fixed which are never been easy.
But still I have personal feeling most chances we will have Bayern Munich in better against Lazio because they can do with their strength even they are facing problems, but Lazio is also in not good situation with their last few games gone badly against them and their confidence level which was surely at his best after beating Bayern Munich again down but how things will be work for the both teams which are trying to recover it's never been easy and Bayern Munich surely never like to have exit from Champions League like this at their home.