Chelsea are doing well currently; we all know that, and if we should follow how Manchester United performance was going before sacking Erik Ten Hag, then I would say we should be expecting Chelsea to beat Manchester United for sure. But since they have a new manager now, we don’t know what type of strategy he will come with,
That’s just the facts about the Chelsea performances they have a great performing this season that not nobody expected from them, with the way they take end last season with the poorly performances I was not think that they can make an wonderful improvement this season; but indeed they with their much efforts and work of there management everything become possible for them. For the Manchester United I don’t expect any different strategy from them, because they just sacked coach and that will not mean they can make an quickly improvements with this their new manager.
so we can’t conclude for now till then. But you are right with what you said; if they later fail to do as expected, the criticism on Erik Ten Hag will be in their head again. But let's wait and see what will happen when they meet with Chelsea, but United have a lot of hard work to do to meet up the points.
With the currently performance of Chelsea it will very hard for Manchester United to defeat Chelsea, So in my view i don’t think Man united make anything happen when they meet with Chelsea: because their performances have been very poorly for a while.