Bayern Munich clearly cannot underestimate the current Arsenal, and in my opinion don't expect a goal massacre like before because Bayern Munich squad is no longer ideal, even though Harry Kane is there, it's still not enough to silence Arsenal under Arteta control. I guarantee that this match will be very difficult for Bayern Munich to control, and Muller, who always underestimates his opponent, this time has to take back his words. For many people Arsenal may not be the favorite, but statistically the Arsenal squad playing at home is in a positive trend.
The fact is, Bayern Munich needs hard work to beat Arsenal who are in their best performance, it is not an easy job to beat a team that is performing impressively, while Bayern Munich performance itself is considered unstable this season. Overall, the strengths of Arsenal and Bayern Munich are currently fairly equal, meaning no one looks more dominant, Tuchel squad have simply had a better reputation in the Champions League, but this season Arsenal are different and they should no longer be underestimated.
Arsenal may be in their best form but that is mostly in their premiership league which is totally different from the champions league. When it comes to the champions league, a lot of things come into play and experience is at the front of the factors. Bayern Munic is obviously more experienced than Arsenal when it comes to the champions league. Arsenal have to try very hard to be able to overcome Munic that is favorite to qualify. Now that they are not likely to win their league, they will channel all their energy to the champions league unlike Arsenal that is also fighting very hard to win the English Premiership title.