The counterattack that Bayern must anticipate when facing Galatasaray because seeing from their game against Manchester United, the long passes of the Galatasaray players for counterattacks are quite troublesome and this must be anticipated by Bayern who always attack by locking up the defence and their players always come out of their posts to help attacks such as Davies and Mazroui who are always active in helping Bayern's attacks this could be a gap for Galatasaray.
But I'm pretty sure with the current difference in strength then this will not be a problem for Bayern and they will still win 3 points in this match.
Bayern Munich also have to control the midfield if they want to limit Galatasaray's space and long balls are their mainstay when counter-attacking. Even though Bayern Munich has much better strength than Galatasaray, Tuchel must be careful if he doesn't want to lose points when hosting Galatasaray, because after all Okan Buruk will try to maximize the home game to have a chance of qualifying for the next round
Galatasaray's front line also looks very good, Ikardi and Saha have a balanced speed in building attacks, these two players played a big role in beating Manchester United at Old Trafford. Galatasaray also has a good defense and they don't concede more than 3 goals in each match, so Tuchel must implement a strategy that is suitable for his team in breaking into their goal.
To be honest, when Tuchel implemented the 4-2-3-1 Scheme, it was an indication that they prepared the midfield well so that their dominance in a match was well organised.
Goretzka and Kimmich who are good enough as defensive midfielders but can always help the attack is obviously very good for them plus 3 attacking midfielders where Gnarby and Sane who can just move quickly to the side of the field assisted by Davies it clearly benefits them in controlling the midfield so I don't think something like that is a big problem.
But in the end this also depends on Galatasaray whether they will try to apply a defensive scheme in this case or instead take the risk of trying to match the fast style of Bayern.
Because it's a defensive option, it can be good but it can also be a blunder when letting Bayern get control of the ball for too long.