But Kokcu insists he is feeling settled in Rotterdam.
"It doesn't really matter to me, frankly. My father and my agent are busy with that," Kokcu told RTV Rijnmond.
"I try to isolate myself from that. That works fine. Fortunately, I am a footballer and not an agent.
"I want to make the best of it next season and want to be as fit as possible when the competition starts again.
"For now I'm only working with Feyenoord. I have a contract until 2023, so I'm not in a hurry.
"When the moment arrives and I feel good about it, we'll see."