Speaking at the launch of Arsenal and adidas's new away kit, the Spaniard said: "I always wanted to respect Real Sociedad. But once Arsenal convinced me, I knew it was the right project. Signing for Arsenal is a big change for me. It's the change I wanted.
"And since the first day I've been here I've noticed the greatness of this club and I'm adapting. I don't know what Mikel Arteta saw in me, but what I saw in him is that he's a top coach in Europe. When I wanted to leave Real, I wanted a quality coach, and I think I've found one. I've seen how obsessive and detailed he is with his game, so I think I've found the right one."