Chelsea have completed the £8m signing of Barcelona midfielder Deco.
The 30-year-old joins the Premiership club on a two-year contract.
The Portuguese international told his new club’s official website: “It is good for me to be here and first of all I am very happy to be here.”
He continued: “I am sure I have come at the right time to do great things and be able to help Chelsea go back to the way it was and come back to being the first one, not only in England but also to win the Champions League that has been their dream for so long.
“The Premier League is a great league and it is getting better and you can see that with the Champions League Final, where you had two English teams.
“It is great that we have so many great players here at Chelsea and it is great that there is the competition which is healthy for everybody and this just makes the team better.
“To have great players in any position of the club just enhances the club.
“I know it is a new challenge but I am looking forward to it.
“I know I need a little bit of time to adapt bit but I am sure I will adapt quite well and quite fast and do my best for the team.”
He added: “I always speak with my team mates when we are together with the national team and they have always told me how great Chelsea is and how great it is to play for this team.
“But the interest for me came about before we were in the Euros, I said to them that’s great for you and Chelsea must be a great place to work with and obviously now I am very happy to be here.”
He concluded: “It was a great moment for me to win the Champions League and it was great for the team to win the Champions League.
“I know it is very important to Chelsea and I am sure it is going to be great for me to win the Champions League again with Chelsea.”