AC Milan sporting director Massimiliano Mirabelli says Marouane Fellaini will leave Manchester United this summer, but admits the Italian club have not yet agreed a deal for the Belgian.
Fellaini's current contract at Old Trafford is due to expire this summer, although Manchester United boss Jose Mourinho has claimed that an agreement is "in place" to extend Fellaini's spell at the club.
Fellaini is yet to publicly commit his future to United, with AC Milan among a number of clubs linked with the Belgium international.
Mirabelli insists Fellaini will turn down the chance to extend his stay at United and believes the former Everton midfielder could be tempted into a move to Serie A.
"Fellaini could be an important player, he is," Mirabelli said.
"We know he is not going to renew with United, but it's difficult to say that we have closed the deal. He has important attributes. We will do something in that role but we are keeping everything in reserve.
"First we have to secure our signings, then announce them."
Fellaini joined United from Everton in 2013 and has since scored 20 goals for the club in 155 appearances.