Roberto Mancini has confirmed Inter have been forced to sell Mateo Kovacic to Real Madrid because of Financial Fair Play regulations.
Goal understands that the Serie A club have accepted a €35m offer for the 21-year-old midfielder, who will sign a five-year contract worth €4m per season with Madrid.
With Inter having splashed out €40m on Geoffrey Kondogbia this summer and with Stevan Jovetic and Martin Montoya among those joining the wage bill, Mancini admits selling Kovacic and Xherdan Shaqiri to Stoke City is essential if the club want to comply with Uefa legislation.
"What can you do? There are rules to respect. There is FFP and I don't think any of us wanted this but unfortunately we have to follow Uefa's impositions," he said to Mediaset Premium after Inter's friendly draw with AEK.
"This doesn't mean we're not trying to make a team that can fight without him.
"We're all disappointed, from the president, to me, the directors and his team-mates.
"Both he and Shaqiri left for the same reason. But we'll do other things. We hope to take in players that suit us.
"We'll see what happens."
Mancini was also upbeat despite surrounding his side's Serie A hopes this season despite another disappointing pre-season friendly.
"There were some difficulties, but that's normal," added the former Manchester City boss. "There were good things in the first half, we did better in defence, the defenders have improved by playing together."