The 22-year-old said: "To be honest, if you ask me what my future is, I don't really think about it. Every day I could give you a different answer.
"It would be hard to leave Sunderland as it has been a great experience for me here.
"I love the place and the fans and they love me back. Of course, we are talking about business and contracts and everything else.
"It is not my decision, but at the end of the season a decision will be taken."
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