Speaking to Turkish radio station Radyospor, Dogru said: "Of course it's perfectly normal for him to be involved in transfer speculation after his performances with Leicester City this season.
"However, we have no interest in this discussion. Both club and Caglar are looking to continue with each other. He is only focusing on the remaining of the season."
Dogru added: "I have to say, he's performing well above our expectations.
"Obviously, we were thinking he will get more playing time this season.
"In his success, I think we can underline the importance of his team-mates and the manager."