Inter Milan have confirmed the appointment of former Chelsea manager Jose Mourinho as Roberto Mancini's successor.Mourinho, who was sacked by Chelsea in September, has been out of the game since then, biding his time until finding a suitable role to take. The Serie A champions finally parted company with Mancini last week after months of speculation and the Portuguese boss, a Champions League winner with Porto in 2004, has signed a three-year deal at the San Siro. Mourinho will be unveiled tomorrow at a press conference at 11.30am local time. A statement on Inter's website, www.inter.it, confirmed: 'Internazionale announce the arrival of Jose Mourinho. 'The Portuguese coach has signed a three-year contract and will work alongside Rui Farias, Silvino and Andrei Villas Boas. 'The assistant coach will be Giuseppe Baresi.' It continued: 'Thanking Roberto Mancini and his staff for the success obtained in four seasons as the leader of the team, all of Internazionale has the great pleasure to welcome Jose Mourinho and his coaches.' Mourinho has big shoes to fill as Mancini led Inter to the Serie A title in each of the last three seasons. Mancini's departure was a protracted affair, with reports last week suggesting there had been a breakdown in communication between the coach and president Massimo Moratti. Mancini's agent claimed after Tuesday's 25-minute meeting between the pair that his client had left the club and would be replaced by Mourinho. The Italian's dismissal was confirmed by the club on Thursday, just hours after Inter had threatened legal action because of reports they claimed did not 'correspond to the truth of the facts'. Inter cited Mancini's announcement in the wake of their Champions League defeat to Liverpool on March 11 that he would step down at the end of the season as a crucial factor. Mancini reversed his decision 24 hours later and went on to lead Inter to their third straight Serie A title, but after much speculation, his departure was confirmed on Thursday evening. Mourinho has long been linked with the post at the San Siro. He was appointed as manager of Chelsea back in 2004 after leading Porto to the Champions League title. He led Chelsea to back-to-back Premier League titles, but could not bring the Champions League trophy to Stamford Bridge in just over three years in charge at the London club. He left Chelsea last September by mutual consent and has been linked with a host of top jobs since.