"Manchester City can't keep me if I don't want to stay. What happens now? Well, at this stage I can't stay. I just want to concentrate on Euro 2008. Now is not the time to be making decisions on my future.
"I don't know anything about Bremen and at this stage I don't want to know.
"If Celtic want me and they can agree something with City then it should be very easy - but we'll wait and see."