Jose Mourinho insists his relationship with Roman Abramovich is "back on track" after the disagreements that led to his Chelsea exit in 2007.
Mourinho first arrived at the London club in 2004, winning the Premier League in his first two seasons, only to fall out with the Russian and leave in September 2007.
After returning two years ago, the Portuguese finished third in his first season before returning to the summit in May and says harmony is restored as he goes in search of a fourth league crown this weekend.
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Speaking to Sky Sports, Mourinho said: "In my first period, my personal relationship (with Abramovich) was very good but professionally we had some interferences and a bit of a disagreement with some ideas.
"In this moment we don't have this problem. When I left Real Madrid to come here, Mr Abramovich asked me to fight for titles.
"In my first season we were almost there, in my second season we did it and in my third season if you are close, you can always do it."
Chelsea are looking to become the first team to retain the Premier League title since Manchester United in 2009 and Mourinho believes the usual clubs will be pushing them hard.
"The top five are the top five, and why not a club like Tottenham to get in there?" he added.
"But in the end history plays a part and investment plays a part. Chelsea (were) four times champion in the last decade. Arsenal are a fantastic club with great players. Liverpool have amazing investment.
"Man City is a squad to love and a club with two Premier Leagues in the last four or five years. And Man United with everything - the history, the players, the investment. So everybody will be there."
The champions begin their defence of the title with a home game against Swansea City on Saturday and their first away game is against Manchester City, last season's runners-up, on August 16, which can be seen on Sky Sports.