Oliver, who left Inter's offices after completing the deal told Sky Sport Italia, "The deal between both clubs is done. That goes for [Aliaksandr] Hleb too."
The Barcelona director has been thrashing out final details in Milan, and he will now return to the Spanish city in order to present Ibrahimovic with the transfer documents.
One final brick needs to be laid for the deal to become concrete and that is the signature block.
Barcelona's Txiki Begiristain has also confirmed the deal is in place and Ibrahimovic needs to put pen to paper.
"We have an agreement with the player and with Inter, and we are now preparing the documents," Begiristain told Sport.es.
"The transfer paper is in Milan as our directors there are negotiating it with Inter. We are trying to do things as fast as possible and he [Ibrahimovic] could be unveiled on Monday."
It is suggested both clubs will announce the deal as official once both men sign and rubber stamp their respective contracts.
State Of Play
If you're having trouble keeping up with one of this summer's more confusing sagas, here is the exact situation, correct at time of this article's publication. Be sure to check the latest article for the latest updates!
- With the deal complete, all that remains are the players signatures. This is likely to happen between now and Monday once Barcelona have the transfer documents from Inter.
- Inter will receive between €48m and €52m for Ibrahimovic. The exact details of the transfer are likely to surface on Monday.
- Monday is the day both teams are expected to announce the deal as official.
- Contrary to earlier reports, Aliaksandr Hleb arrives in Milan as part of the Maxwell to Barcelona deal. The Belarus midfielder played no part in the Eto'o - 'Ibra' transfer.
- Italian sources claim Jose Mourinho is delighted with the outcome of the long-running transfer.
- Ibrahimovic is set to arrive in Barcelona on Sunday for his medical.