Arsenal are locked in talks with ASSE over a deal for €25-30m. But Caiazzo has reaffirmed their insistence that Saliba be sent back to them on-loan next season.
But Caiazzo says: "Our accounts are in balance. It is not vital to sell him. We know that there are solicitations and that his future probably passes by a departure to a top European club.
"But there is no urgency. He will stay this season. It is an imperative condition if we come to an agreement for his transfer. Conditions have been clearly defined.
"It's also William's wish. He wants to wear the green jersey this season, to play the Europa League. And it is his interest to continue developing before leaving."