Antonio Conte says they are keen to sign the Belgian but admits there are factors stopping the transfer.
Inter are keen to sign the Belgian striker but they are yet to meet Manchester United's valuation of the player who cost them £75 million (AED 345 million) from Everton two years ago.
The signing also depends on Mauro Icardi, as he decides his future at the Serie A club. The Argentinian has not travelled on the club's summer tour amid reports he wants to leave.
Romelu Lukaku will not play for United against Inter in Singapore on Saturday in their pre season.