Manchester United have been linked with a move for Ivan Perisic for weeks but have failed to get the deal over the line.
Inter Milan boss Luciano Spalletti has claimed the deal is now 'closed' and claimed he would resist any late attempts for the Croatia international to leave.
And United sources have revealed Jose Mourinho is disappointed by United's lack of urgency, citing it as the major reason the move failed to materialise.
The Independent claim the Portuguese wanted all of his business finalised before the Red Devils' tour of the USA, which has failed to happen.
Luciano Spalletti: Conversation of Perisic to Man United is 'over' 1769449591Rkoiqwdg
Mourinho is said to have wanted a full pre-season to work with his new signings and help them bed in.
And he thinks delays at United's end have cost him and the club a deal for Perisic.
Speaking last week about the 28-year-old's future at Inter, Spalletti said: "There was a contact a few weeks ago, then the negotiation stopped, so for me it is closed.
"The more days that pass, the more difficult it becomes for us to find a replacement of his calibre.
"I'll strongly oppose his sale."
Spalletti has taken a tougher approach on Perisic leaving as the transfer has dragged on as last month it seemed more open to selling.
"He’s an important player in the team and we’re counting on him to start the new season,” Spalletti said.
“Sure, there were rumours, but the status quo is that we want to keep Perisic.
“Having said that, if someone comes in with a very difficult offer to reject, then we’ll consider that.
“But, of course, we’ll need to find a valid alternative for Perisic as well.”