The Belgium international left-back joined Hannover last January from Standard Liege and he still has over two years left on his current deal.
However, reports in Germany claim a number of Premier League clubs - including Aston Villa and West Ham - are monitoring his situation.
Now Dufner admits that the club would look at an offer should it come in, and if it is what Pocognoli wants.
"If he (Pocognoli) comes up with a concrete offer, we will surely look into it,"
Dufner told Bild. "Still he has to signal that to us.
"If he thinks he is in touch with a club that offers him better chances to win a spot in the Belgium World Cup squad, then he should tell us about it!"