Levy said: "No person is bigger than the club. I very much hope Dimitar will be here at the start of next season but I hope that most of the first-team players will still be here.
"It's always difficult talking about individual players coming up to a transfer window, but I don't expect any of our players to leave in January.
"I very much hope they will be here in the summer. But summer is a long way off and a lot can happen between now and then."