Djourou has been linked with Napoli this week.
Flavio Ferraria told TMW: "A player is never happy when he does not play, but we talk about a great professional who knows how to always be ready when called upon.
"Djourou is very much linked to Arsenal, we are talking about one of the best clubs in the world. He has a contract until 2014 and before considering any proposals it is clear that one of us should think very hard. To leave Arsenal he needs to find a team just as prestigious."