The highly-rated Danish forward has been linked with the likes of Tottenham, Liverpool, Borussia Dortmund and AC Milan and his agent Martin Schoots claims that there have been chats with some of those who are significantly attracted.
"We are still keeping in touch with certain clubs." Schoots told Sporten.dk.
"That will always be the case with a player like Christian. At this point, it is hard to tell if it will end up with a transfer."
He added: "He wants Ajax to get money for him and therefore he will extend his contract, in case he does not succeed in finding a new club."