He told chelseafc.com: "I was under contract at Marseille, but as soon as I know a great club like Chelsea were interested in signing me, I tried to move to the side trying to get an agreement between the clubs. I spoke a bit with Juan Mata who was at Chelsea. When I signed I was so happy. I walked through the door for the first time and was sitting next to legends of the game, and then was on the pitch with them.
"I could see straightaway the ambition and desire of the club. It was a big step forward in my career. The club had just won the Champions League and I wanted to be part of that success in the future."
Azpilicueta added: "My first official game was against Wolverhampton in the League Cup. I remember we were winning six-nil and I kept going up and down, up and down, I didn't want the game to finish. I was enjoying it so much I wanted to keep playing forever!
"I knew I had to take every chance I could, but I used the time when I wasn't playing to learn and adapt to the Premier League."