Juventus are interested in the midfielder.
But Tuchel said: "We haven't talked about it.
"He has a lot of game time I would say, if you look at last year and this season.
"He has a lot to fight for here in my personal opinion."
Tuchel was also asked about recalling players back from loan.
"This will happen behind closed doors when we have something to announce about bringing players back.
"It's not only about the need to bring players back but also about the possibility.
"Kenedy is back an I'm very happy. It is a huge opportunity for him to make his mark at this club.
"We will try to push and support him as good as we can."