It emerged earlier this week that the Reds were closing in on a move for the winger after agreeing a fee with the Serie A club.
And it appears Inter are already planning for the future without Coutinho after Moratti confirmed that they would look to use the money from his sale to strengthen the squad.
He told Sky Italia: "The deal for Coutinho to Liverpool is an opportunity both for Inter and both for the player.
"We could be happy with the economic proposal and Coutinho could find the space he hasn't here. And then we'll have the opportunity to reinforce the team".
If the deal is completed, Coutinho would become the club's second signing of this transfer window following the £12million capture of Daniel Sturridge from Chelsea.
Coutinho came through the youth system at Vasco da Gama before joining Inter at the age of 18.
He spent the second half of last season on loan at Espanyol, where he worked with new Southampton manager Mauricio Pochettino.
Pochettino's recent appointment at Saints led to speculation linking Coutinho with the South Coast club but it is understand he has expressed a preference for Anfield.