Bendtner is on-loan at Juventus this season.
An angry Olsen told fyens.dk: "I will not stand here every day and comment on Bendtner's form. He is part of the Danish national team and we will use him as we see fit. He is just as important as everyone else."
Bendtner added: "My form is good. It is as it should be. I have been training well for a long time so I'm in good shape."