Diego Costa has claimed that it was "an easy decision" to leave La Liga winners Atletico Madrid for Chelsea this summer, as the Blues have "the best manager in the World" in Jose Mourinho as well as some of the best players.
The Spanish international striker completed his £32m move to Stamford Bridge earlier this summer after garnering a reputation as one of the best strikers in the world in La Liga last season.
Mourinho earmarked the signing of a top striker as his top priority for the summer transfer window and from the very beginning Costa was said to be his chosen one.
Asked during an interview with Chelsea's official website what made him choose the Blues, Costa said: "It was an easy decision for me to make.
"We have some of the best players in the world, the best manager in the world and it's a club with great history. I want to improve, not only as a player but as an individual, and I believe this is the perfect place for me to do that. That's the reason I chose Chelsea and why I want to defend this shirt.
"Yes, of course he [Mourinho] has spoken to me, but one of the main things he said was that he doesn't want me to change. It was Jose's and the club's decision to buy me and the reason they signed me was because of the way I played at Atletico. I don't feel I have to change much, I just have to improve fine details to become a better player, hopefully I will have a similar season to the last one."
Costa, who born in Brazil but plays for Spain, believes that Chelsea's Spanish and Brazilian contingent will play a crucial part in his adaptation to Chelsea and the Premier League.
"I spoke to them during the World Cup at various times. When I knew I was making the step to come here I took advice and asked what to expect" the striker said.
"They told me it was an outstanding club with great staff and a great structure to it. They told me it would be a place where I could enjoy my football and improve my own game.
"We still have the three Brazilian players – Oscar, Willian and Ramires – to come back and I've played with them and asked them about the club as well. Whenever I speak to them about Chelsea they only have good things to say so when they arrive for pre-season there will be a big group of players I get along with and know already, so I won't have any problems."