He said: "I have had to handle expectation and pressure throughout my life.
"I'm not scared and that's why I'm here. The most important things are to enjoy myself, help the team to win more trophies and entertain the fans.
"If I do that, if I play like I did at Tottenham, I don't think it will be a problem.
"I'm at the biggest club in the world and here I can develop in the way I want and that's the most important thing. I really hope I'll be successful here."