The former Arsenal captain told The Sun: “It’s a challenge I always wanted and it’s just as hard as I expected, mainly because I am impatient to succeed.
“Both teams play similar football. But at Barcelona they have taught me if I stay in my position the ball will come to me and I will see far more of it than if I go looking for it.
“It has been a big change but I’m learning very fast now and my team-mates have been amazingly supportive.
“I know that I can succeed here.”