Dzeko has been linked with Borussia Dortmund.
"Edin is an important player for us," said Mancini. "Until now we have not talked about the transfer market, as there are ten games to go. But in June, anything can happen. If a player asks for a transfer, then we have a situation to evaluate. This applies to all players.
"For me, Dzeko a great player. If he would play football in Italy, he would score more than 20 goals every season. But he is worth at least €20 million, maybe more."