Porto boss Jose Mourinho is expected to meet Chelsea chief executive Peter Kenyon on Saturday to discuss taking over as the club's new manager.
BBC Sport has learned Chelsea will announce Mourinho as their new manager on Tuesday on a four-year-deal.
Mourinho is said to have already told Porto he intends to take over at Stamford Bridge if the terms are right.
Current boss Claudio Ranieri will hold talks with Chelsea in the next three days to resolve his future.
Mourinho, who led Porto to European Cup success against Monaco on Wednesday, told Portuguese cable channel Sport TV on Thursday: "I would really like to accept Chelsea's invitation.
"It will be decided in the next few days when I tell Porto's management of my intentions but the two clubs have talked."
And it is believed the 41-year-old wants the contract with Chelsea to be completed as soon as possible in case there is a backlash from Porto fans.
But although the financial terms are not an issue, Mourinho will not rush into signing until he receives assurances from Blues owner Roman Abramovich that he will be in sole charge of team affairs.
He earlier said: "One club had a serious conversation with my agent and a small conversation with me. I have given my word to them and I will not change my mind.
"My agent was involved in a few conversations. I want everything to be done right.
"I will speak to the Porto president and I hope he respects my wish to leave.
"There is one club I give my word to and one I would like to go to and this won't change even if I get other situations because we have won the Champions League."
Ranieri held a meeting with Chelsea owner Roman Abramovich and chief executive Peter Kenyon at a hotel in Milan, Italy, on Thursday.
It seems certain now that the Italian will give way to Mourinho as coach - with Ranieri either leaving altogether or moving into a director of football role.
Kenyon said on Wednesday "the situation should be resolved next week".
Meanwhile Mourinho will leave Porto in the knowledge he made them the first club since Liverpool in 1976 and 1977 to win the Uefa Cup and European Cup in successive years.
The Portuguese club reportedly want Chievo coach Luigi del Neri to take over from Mourinho.
And Del Neri told Portugal's Radio Renascenca: "Yes, they have contacted my agent and there is a possibility of being coach of Porto."