His agent Mino Raiola told the Daily Mail: "We are talking, yes it is possible that he could stay.
"This year the message was clear he was not for sale and he is really happy there at the moment. We are happy with what the club is doing now, we will see how the season goes.
"I spoke with him after his hat-trick against Sunderland. I said you were rubbish, you should have scored six!
"There was talk of Juventus but no-one can afford him in Italy. Outside of England, realistically the only clubs that can afford him are Paris Saint Germain, Bayern Munich, Barcelona and Real Madrid."