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Diego Costa had a successful three-year spell at Chelsea, where he won the Premier League twice.
Costa scored 59 goals in 120 games for Chelsea, to help the club win two Premier League titles and the League Cup.
However, the Brazilian fell out with then boss Antonio Conte in 2017, which led to his exit from the club.
Costa was given a very warm welcome on his return to Stamford Bridge, as Chelsea defeated Wolves 3-0.
Costa has hailed the Chelsea fans, and rather revealed that it was Antonio Conte he had issues with.
“It was special,” Costa told ESPN Brazil.
“Feeling that you did your job when you were here and then leaving with good memories.
“Receiving this affection from the Chelsea fans… I’ve always had affection. I have nothing to complain about the Chelsea fans. When I was here, they always treated me well.
“It wasn’t the fans. It was with that coach… Conte. I had a very good relationship with the Chelsea fans. I was a champion! It was in the year that we won the second title. Conte didn’t count on me as much and I couldn’t stay.
“The affection I received today shows that I was never fighting with the fans. But I had to leave. It wasn’t my issue.
“It was because of the coach at that moment. Today is proof that the crowd has always been by my side and had affection for me.”
On his surprising return to the Premier League at age 34, Costa added: “I did not imagine returning to the Premier League.
“It is the best league in the world, the games are always wonderful, the stadiums are full. It’s a new challenge, I know it won’t be easy. But I want to do something beautiful here.”