Abraham, 23, has struggled for regular game time under Tuchel because of competition for places at Stamford Bridge and also an ankle injury which has troubled him for the past few weeks.
Tuchel said: “We had some talks to encourage him to never give in, to accept the situation, to not overthink it, to just come back to the situation where the striker must not overthink it.
“He just needs to be in the flow and if the team is winning without him then you can feel a little bit excluded.
“But it's not like this with him so hopefully he can be back now, back in the squad, be totally free and there's some hard choices and he's a part of the group.
“It's been hard for him because he's never felt fully free, never felt fully painless after this tackle so it was hard for him to really perform on the level that you need to perform in training to convince your coach to leave somebody else out.
“In the moment where we left him out, it was a strong decision, we had other options on the bench. I think we started the Man United game with Oli Giroud, maybe Timo from the bench and maybe it was a tactical choice from a position wise.
“He had a bit of a tough time because he started twice for us in the league, got substituted twice, didn't have the easiest games, couldn't find the momentum and once he got the bad tackle then suddenly the momentum shifted a little bit.
“He suffers a little bit from me not finding the real formation up front. 'OK, lets' play always like this, this is tour position, these are the guys you compete against and compete against A, B, C and D.' It's a bit more complex because I have to get to know the team better.
“Sometimes we play with wingers, sometimes we play with players with No10 profiles, we have Timo who can play as a No9, Oli and Kai who can play No9 so he suffers a little bit from all these circumstances and it's not his fault. Maybe more my fault than his fault."