Chelsea have confirmed the signing of Portugal midfielder Deco from Barcelona on their official website.
The west Londoners are expected to confirm they have paid €11 million to sign the two-time Champions League winner on a two-year deal.
The Brazil-born player's exit from the Nou Camp proved to be protracted due to the Catalans' 14 million euro valuation of the player.
That figure seemed to have deterred Internazionale - who were also apparently interested - but Chelsea have managed to negotiate the price down.
Jose Mourinho, who coached Deco during their time at Porto, was linked with the diminutive schemer on numerous occasions during his Stamford Bridge tenure and was reportedly interested in signing him after taking over at Inter recently.
Deco's arrival is Chelsea's second signing of the summer after international team-mate Jose Bosingwa.
Deco told Chelsea TV: 'It is good for me to be here and first of all I am very happy to be here.
'I am sure I have come at the right time to do great things and be able to help Chelsea go back to the way it was and come back to being the first one, not only in England but also to win the Champions League that has been their dream for so long.'
New coach Scolari starts work officially at Chelsea on Tuesday morning and will undoubtedly be happy with the club's transfer business so far.
Deco's arrival significantly boosts a midfield line-up already featuring the likes of Frank Lampard, Michael Ballack, Michael Essien, Mikel Jon Obi and Claude Makelele.
Indeed, Scolari will be faced with the task of persuading England midfielder Lampard to remain at the club.
Scolari will have a busy first week ahead of him before the players report back for pre-season training but Lampard's future will be a top priority.
The Brazilian has already been linked with a number of transfer targets, the latest of which is Real Madrid forward Robinho, but he has the unenviable task of persuading both defender Ricardo Carvalho and Lampard to remain as part of the Chelsea squad.
Lampard has one year remaining on his current contract and the holidaying midfielder seemingly refused to rule out a move to Inter when quizzed over his future.
Scolari also looks as though he will lose defender Carvalho, another target for former Blues boss Mourinho at Inter.
